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Cognitive scientist
Joscha Bach, a German-born AI researcher and cognitive scientist, had a substantial and well-documented relationship with Jeffrey Epstein spanning at least 2013 to 2017, receiving over a million dollars in funding for research, personal expenses, and his children's private school tuition, while engaging in extended personal correspondence with Epstein on topics including intelligence, race, and governance.
Bach appears extensively throughout the documents in both personal emails and Epstein's detailed daily schedules. The highest-signal materials are direct email exchanges between Bach and Epstein in 2016 discussing theories of intelligence, race, and gender differences in cognition — correspondence that became the subject of significant media coverage when released by the House Oversight Committee in 2025. Travel records and scheduling documents show Bach visiting Epstein in the U.S. Virgin Islands (arriving via JetBlue in January 2015), staying in Epstein's New York apartment for multi-day visits, and attending dinners and meetings alongside figures like Martin Nowak, Noam Chomsky, Joi Ito, George Church, Danny Hillis, and Larry Summers. Epstein's assistant Lesley Groff coordinated many of these logistics, explaining the high co-mention count with Groff.

Perversion of Justice: The Jeffrey Epstein Story
Julie K. Brown
Investigative journalism that broke the Epstein case open

Filthy Rich: The Jeffrey Epstein Story
James Patterson
Bestselling account of Epstein's crimes and network

Relentless Pursuit: My Fight for the Victims of Jeffrey Epstein
Bradley J. Edwards
Victims' attorney's firsthand account
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From: Joscha Bach To: Lesley Groff <MINIII > Subject: Re: Jeffrey Epstein Date: Sat, 27 Apr 2019 18:16:50 +0000 Thank you! > On Apr 27, 2019, at 10:43 AM, Lesley
>>>>> >>>>>> Thank you so much, Lesley! >>>>>> >>>>>> >>>>>>> On Apr 25, 2019, at 05:19, Lesley Groff -,; > wrote: >>>>>>> >>>>>>> Good morning Joscha. to confirm we do have an apt 10B. The code to Please let me know what time >>>>>>> >>>>>>> Sent from my iPhone >>>>>>> >>>>>>>> On Apr 24, 20
PM, Lesley Groff < Thank you for confirming the available for your stay Sunday . Address is you will vacate the apt on Tues Bach to use the Hi Joscha. Jeffrey is coming back to New York earlier and him on Monday instead of Tuesday. Might this be possible? me know what works. Thanks Lesley wrote:
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han later... > on Mar 12, 2018, at 12:34 PM, Joscha Bach < wrote: > Of course! I will be there. » On Mar 12, 2018, at 11.42, > wrote: >> » HI Joscha...I just spoke to Jeffrey and he actually will NOT head up to Harvard this Friday—he is asking if you might be able to come to NY a bit earlier on
To: Joscha Bach From: Sent: Mon 3/12/2018 7:14:35 PM Subject: Re: Apartment Great...what time can you be in the city? Would 11 or 12pm work? Jeffrey's home: 9
ome instead! Might your schedule allow this? >» On Mar 11, 2018, at 8:48 PM, Joscha Bach < > wrote: >» >>> Thank you so much! >» Bests, >» >» Joscha >>> >» »» On Mar 11, 2018, at 20:28, wrote: >>» >>» YES! we have 7J available! Will set aside for you. >>>> >>» 301 East 66th Street (corne
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for BACH/JOSCHA 24NOV18 TMDLVY Date: Thu, 08 Nov 2018 17:50:12 +0000 Yes, continued! Thank you! — Joscha Am 08.11.2018 urn 11:19 schrieb >: HI Joscha. Here is your ticket! Please double check for accuracy and confirm receipt. Thanks, Begin forwarded message: From: "American Express Travel" < Sub
From: Joscha Bach <I To: Cc: Bella Klein Subject: Re: Itinerary INCL TICKETNO for BACH/JOSCHA 24NOV18 TMDLVY Date: Thu, 08 Nov 2018 17:50:12 +0000 Yes, continued!
ella Klein Subject: Re: Itinerary INCL TICKETNO for BACH/JOSCHA 24NOV18 TMDLVY Date: Thu, 08 Nov 2018 17:50:12 +0000 Yes, continued! Thank you! — Joscha Am 08.11.2018 urn 11:19 schrieb >: HI Joscha. Here is your ticket! Please double check for accuracy and confirm receipt. Thanks, Begin forwarded
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From: "jeffrey E." <[email protected]> To: Joscha Bach <, Subject: Re: Joscha Date: Thu, 18 Aug 2016 13:21:57 +0000 ok On Thu, Aug 18, 2016 at 7:21 AM, Joscha Bach < wrote: Ah! is in 30 mins good?
d, Aug 17, 2016 at 6:55 PM, Joscha Bach < > wrote: > > > On Aug 17, 2016, at 18:37, Cohen, Susan < wrote: >>> > » Thanks for the quick response Joscha. >>> »> We need to come up with the (1) job title, > > Depending on the structure/type of entity, I can be CEO, CTO, or research scientist. > »
From: "jeffrey E." <[email protected]> To: Joscha Bach <, Subject: Re: Joscha Date: Thu, 18 Aug 2016 13:21:57 +0000 ok On Thu, Aug 18, 2016 at 7:21 AM, Joscha Bach < wrote: Ah! is in 30 mins good? > On Aug 18, 2016, at 07
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From: > To: Joscha Bach Subject: Re: Jeffrey Epstein Fri. Oct. 16th Date: Wed, 14 Oct 2015 19:02:41 +0000 Hi Joscha...circling back to you! Might you and some of your AI friends be able to meet with Jeffrey on Friday in Martin's office at 10;30am? On Oct 9, 2015,
u! Yes, I will be there (I am in Europe, but will come back on Thursday). Are there very particular AI friends that Jeffrey would like to meet? > - Joscha >> On Oct 9, 2015, at 17:31, wrote: >> >> Hello Joscha...Jeffrey will be making a trip to Cambridge next Friday Oct. 16th...might you and your A
From: > To: Joscha Bach Subject: Re: Jeffrey Epstein Fri. Oct. 16th Date: Wed, 14 Oct 2015 19:02:41 +0000 Hi Joscha...circling back to you! Might you and some of your AI
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ass Airbus Industrie A318/A319/A320/A321 Meals: Snack Baggage: 2PC per adult FLIGHT CONFIRMATION Jetblue Airways: VICCVD TRAVELLER INFORMATION JOSCHA BACH EFTA00490714 E-TICKET Ticket 86 2797244137133.28JAN Ticket 2797251015526.17FEB' MIRA MARIA BACH E-TICKET Ticket 86 2797244137134.28JAN Ticke
: February 17, 2019 at 2:33:42 PM EST To: Subject: Itinerary INCLTICKETNO for BACH/JOSCHA 23FEB19 UOVEMP FLIGHTS I HOTELS I CARS I CRUISES Thanks Joscha! Your reservation is confirmed. Enjoy your trip! RECORD LOCATOR: UOVEMP YOUR TRIP DETAILS DO NOT REPLY TO THIS EMAIL. This message was sent from
NCL TICKETNO for BACH/JOSCHA 23FEB19 UOVEMP Date: Sun, 17 Feb 2019 19:38:30 +0000 Attachments: BACH JOSCHA-UOVEMP.pdf; UOVEMP_ItineraryCalendatics Joscha Here is your new tickets. Please let me know if anything else is needed. Thank you, Bella Begin forwarded message: From: "American Express Trave
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From: Lesley Groff To: Joscha Bach Subject: Re: Jeffrey Epstein Date: Thu, 22 Mar 2018 10:51:28 +0000 Super. thank you > On Mar 21, 2018, at 10:44 PM, Joscha Bach < > wrote: > Su
3pm on Sunday? >> >> >>> On Mar 20, 2018, at 5:49 PM, Joscha Bach wrote: >>> >>> Yes! Please let me know about the hours. >>> Bests, >>> >» Joscha >>> >>> >>> >>>> On Mar 20, 2018, at 15:39, Lesley Groff > wrote: >>>> >>>> Hi Joscha...Jeffrey is planning a trip up to Harvard this Sunday M
0 Super. thank you > On Mar 21, 2018, at 10:44 PM, Joscha Bach < > wrote: > Sure! >> On Mar 21, 2018, at 07:36, Lesley Groff < wrote: >> » Hi Joscha. Please can you see Jeffrey at 3pm on Sunday? >> >> >>> On Mar 20, 2018, at 5:49 PM, Joscha Bach wrote: >>> >>> Yes! Please let me know about t
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this is all just perfect! If you need to go back to the apartment on Friday it is totally fine! Just let me know... :) On Dec 3, 2014, at 12:10 PM, Joscha Bach < > wrote: > Dear > sorry for not getting back to you earlier; I still needed to fix my calendar. I will arrive sometime in the evening (after 7pm
the apartment during the day, especially if that is a problem. > • Bests and thank you! > Joscha >> Am 03.12.2014 um 09:30 schrieb >> >> Hello Joscha! Sorry to bother you....but Can you please let me know what time you will arrive the apartment tomorrow as well as depart the apartment on Friday (e
go back to Boston at 7pm, but I will probably not need the apartment during the day, especially if that is a problem. > • Bests and thank you! > Joscha >> Am 03.12.2014 um 09:30 schrieb >> >> Hello Joscha! Sorry to bother you....but Can you please let me know what time you will arrive the apartme
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From: To: Joscha Bach Cc: Karyna Shuliak Subject: Re: Jeffrey Epstein Date: Mon, 16 Jun 2014 15:25:51 +0000 ca> Hi Joscha...Could we please shift your appointment wit
From: To: Joscha Bach Cc: Karyna Shuliak Subject: Re: Jeffrey Epstein Date: Mon, 16 Jun 2014 15:25:51 +0000 ca> Hi Joscha...Could we please shift your appointment with Jeffrey on June 21st to 2pm? Also, upon your arrival to Martin's institute, please call either Karyna
if 2pm is good for you! thanks, On Jun 9, 2014, at 2:13 PM, Joscha Bach wrote: > • Thank you for your enthusiastic organization efforts! :-) > — Joscha >> Tremendous. Thanks. >> >> Sent from my iPhone >> >> On Jun 9, 2014, at 1:21 PM, Joscha Bach < > wrote: >> >>> >» Yes! >>> >>>> Hello Jo
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efforts! :-) — Joscha > Tremendous. Thanks. > Sent from my iPhone > on Jun 9, 2014, at 1:21 PM, Joscha Bach < wrote: >> >> Yes! >> >>> Hello Joscha. Might you be able to see Jeffrey at 3pm on Sat June 21 at Martin Nowak's institute at 1 Brattle Square, suite 6? Please let me know! Thanks, Lesley
ey Groff <MINIII > Subject: Re: Jeffrey Epstein Date: Mon, 09 Jun 2014 18:13:57 +0000 Thank you for your enthusiastic organization efforts! :-) — Joscha > Tremendous. Thanks. > Sent from my iPhone > on Jun 9, 2014, at 1:21 PM, Joscha Bach < wrote: >> >> Yes! >> >>> Hello Joscha. Might you be a
From: Joscha Bach To: Lesley Groff <MINIII > Subject: Re: Jeffrey Epstein Date: Mon, 09 Jun 2014 18:13:57 +0000 Thank you for your enthusiastic organization effort
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model behavior that MIGHT have an overlap. - Joi On Jun 18, 2013, at 11:18 , Ryan McCarthy wrote: Already on it. Coordinating with Henry, Deb and Joscha as we speak. Ryan On Tue, Jun 18, 2013 at 11:16 AM, Joi Ito ote: Ryan, can you try to make this happen? Thanks! - Joi (about to board a flight
effrey Epstein[[email protected]: Danielle Nadeau From: Joscha Bach Sent Tue 6/18/2013 3:23:46 PM Subject Re: Great, thank you! Cheers, Joscha Just made intros to Deb and Siggy might be good. Siggy is doing PhD on planning algorithms to model behavior that MIGHT have an overlap. - Joi On
To: Joi Ito Cc: Jeffrey Epstein[[email protected]: Danielle Nadeau From: Joscha Bach Sent Tue 6/18/2013 3:23:46 PM Subject Re: Great, thank you! Cheers, Joscha Just made intros to Deb and Siggy might be good. Siggy is doing PhD
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From: Joscha Bach < To: Jeffrey Epstein <[email protected]> Subject: Fwd: tonight! Date: Wed, 06 Jan 2016 15:06:51 +0000 please tell helen if the dinner is sti
still on! Anfang der weitergeleiteten E-Mail: Von: Helen Fisher Datum: 6. Januar 2016 urn 09:08:01 GMT-5 An: Joscha Bach < Betreff: tonight! HI Joscha, I just saw your email. Lovely to hear from you. Yes, I would love to join folks tonight for a dinner. But should I call Jeffrey? I don't know if th
be great if you could come. (As you probably know, Jeffrey lives next to your place, at 9 East 71st, and can be reached at (212) 533-3739.) Love, Joscha On Nov 3, 2015, at 07:38, Helen Fisher < > wrote: HI there, Joscha, lovely to hear from you. Alas, I won't be in New York tomorrow, Wednesday. So
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ote: >>> >>> Yes! Thank you for letting me know! >>> >» Joscha >>> >>> >>>> On Sep 11, 2017, at 12:54, Lesley Groff e > wrote: »» >>>> Hello Joscha! Jeffrey is considering a trip to Boston/Harvard this Sunday Sept. 17th... might you be around and available? »» >>» Lesley >>>> Assistant to Jef
From: Lesley Groff To: Joscha Bach Subject: Re: Jeffrey Epstein Date: Wed, 13 Sep 2017 20:35:21 +0000 he will! ! thank you...it will just take time... > On Sep 13, 2017, at 4:33 PM
or the update! I hope all is well! > • I also saw the coverage of destruction on the US Virgin islands and hope Jeffrey can rebuild... > Bests > Joscha >> Am 13.09.2017 um 07:46 schrieb >> » Hi joscha. As it turns out Jeffrey will not be able to come up this Sunday. We will keep you posted for ne
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To: Joscha Bach From: Sent Sat 6/17/2017 2:32:04 AM Subject: Re: Your Boston to Amsterdam flight... O Sent from my iPhone > On Jun 16, 2017, at 9:04 PM, Josc
2017, at 9:04 PM, Joscha Bach wrote: > Thank you for caring about these details! > Bests, > • Joscha >> Am 16.06.2017 um 13:05 schrieb >> » Hi Joscha-looks like you may now check in on line and get yourself a seat for the first leg of your trip (Boston-Amsterdam) Appears to be plenty of seats but
dam flight... O Sent from my iPhone > On Jun 16, 2017, at 9:04 PM, Joscha Bach wrote: > Thank you for caring about these details! > Bests, > • Joscha >> Am 16.06.2017 um 13:05 schrieb >> » Hi Joscha-looks like you may now check in on line and get yourself a seat for the first leg of your trip (
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that Jeffrey considers attending Marvin's service on Thursday, and she might get in touch if she has questions! Thank you. > With kind regards, > Joscha >> On Mar 15, 2016, at 11:24, Lesley Groff < wrote: >> Hi Joscha. Jeffrey wants the details of Marvin Minsky's memorial this Thursday March 17. Mi
is there a reception taking place after the memorial ends at 5:30? On Mar 15, 2016, at 1:39 PM, Jessica Sousa wrote: Hi all, the information that Joscha sent is correct. If you prefer an emailed invitation I can send one out, just let me know the correct email address. J Jess Sousa Events and Spec
• Skype: www.me ia.mi .e u EFTA00327874 On Tue, Mar 15, 2016 at 11:47 AM, Joichi Ito < > wrote: Adding Jess. > On Mar 15, 2016, at 10:39 AM, Joscha Bach c > wrote: > Lesley, > it will be at the MIT Media Lab on March 17, at 75 Amherst St, Cambridge, MA, from 3pm to 5:30pm. It will also be webcast
EFTA02285700
To: From: Sent: Subject: Re: Flights to Germany ian Travel[[email protected]] Mon 5/13/2019 2:27:43 PM how long can we hold Joscha's tickets and the families tickets? (the cmails with itineraries no longer state how long tickets will be held. they used to have a statement in RED
's portion. They may need to write Jeffrey a check for their Aino Zora Bach Taiyo Anatol Bach GLUTEN FREE MEAL Mira Maria Bach GLUTEN FREE MEAL Joscha Bach JOSCHA REQUIRES VEGITARIAN MEAL Begin forwarded message: EFTA_R1_01111413 EFTA02285701 From: Subject: Flights to Germany Da To Cc Dear Les
Taiyo: FRA-TXL July 10th 11:45 AM -12:55 PM (LH 182) Flight to MUC for Joscha: FRA-MUC July 10th 12:15 PM - 1:10 PM (LH 104) Flight to Berlin for Joscha: MUC-TXL July 12th 3:15 PM (LH 2040) From July 20th to 25th, we would like to attend a physics conference of the Foundational Questions Institute
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To: Joscha Bach From: Sent Thur 10/11/2018 12:04:27 PM Subject: Re: Jeffrey Epstein Hi Joscha...Jeffrey will come to Harvard on Monday Oct. 15th_I am not posit
To: Joscha Bach From: Sent Thur 10/11/2018 12:04:27 PM Subject: Re: Jeffrey Epstein Hi Joscha...Jeffrey will come to Harvard on Monday Oct. 15th_I am not positive on his timing yet—but might you be available at 3:30pm to meet with him in Mart
Martin's office? > On Oct 8, 2018, at 2:05 PM, Joscha Bach > wrote: > Yes! Thank you for letting me know, and looking forward to meet Jeffrey! > Joscha >> On Oct 8, 2018, at 14:03, wrote: » Hello Joscha. Hope you are well. Jeffrey is considering a trip up to Harvard either Sun. Oct. 14th or Mon.
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ck in. Regards, Natalia (Natasha) Molotkova Centurion Relationship Manager Hours: Mon through Friday 9AM-530PM EST Please do book this hotel for Joscha and please do get a 3rd party credit card authorization form...thanks On Jan 19, 2018, at 11:46 AM, Natalia Molotkova wrote: EFTA_R1_00999283 EF
Regards, Natalia (Natasha) Molotkova Centurion Relationship Manager Hours: Mon through Friday 9AM-530PM EST OK, will do! thanks....) would think Joscha has his own card as well and could use it if worse comes to worse then be reimbursed...Thank you!! On Jan 19, 2018, at 12:12 PM, Natalia Molotkova
To: From: Natalia Molotkova Sent: Fri 1/19/2018 5:22:46 PM Subject: Trip for Joscha Bach Title: American Express 0 Thank you!! Regards, Natalia (Natasha) Molotkova Centurion Relationship Manager Hours: Mon through Friday 9AM-530PM E
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>> >> this sounds wonderful. Yes, please! >> >> Bests, >> » Joscha >> >> >> >>> Am 27.10.2014 um 10:12 schrieb Lesley Groff >>> >>> Hello Joscha...hope you are well...Jeffrey is asking if you might like to attend a symposium titled "Reconstructing Beethoven's Improvisations" on WEd.Oct. 29th.
Am 27.10.2014 um 14:12 schrieb Lesley Groff > • Fabulous! Let me tell Margaret Minsky and I will come back to you! > On Oct 27, 2014, at 2:10 PM, Joscha Bach wrote: » Dear Lesley, >> >> this sounds wonderful. Yes, please! >> >> Bests, >> » Joscha >> >> >> >>> Am 27.10.2014 um 10:12 schrieb Lesl
s Improvisations" Date: Mon, 27 Oct 2014 18:21:49 +0000 Attachments: smime.p7s I filled in the google form. Hopefully, it is not too late! Bests Joscha > Am 27.10.2014 um 14:12 schrieb Lesley Groff > • Fabulous! Let me tell Margaret Minsky and I will come back to you! > On Oct 27, 2014, at 2:10 P
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From: Joscha Bach Sent: Monday, September 7, 2015 6:36 AM To: Ben Goertzel; Jeffrey Epstein Subject: Re: Attachments: signature.asc I agree w/ Joscha's cautio
m: Joscha Bach Sent: Monday, September 7, 2015 6:36 AM To: Ben Goertzel; Jeffrey Epstein Subject: Re: Attachments: signature.asc I agree w/ Joscha's caution about discrimination tasks: They =an be often be solved rather well, but in devious ways, =y statistical supervised learning =lgorithms.
es deep =anguage models without necessarily requiring deep understanding. I am =ure that the linguists have much better ideas than me, of =ourse. — Joscha 2 EFTA_R1_02073452 EFTA02702095

Jeffrey Epstein
PersonAmerican sex offender and financier (1953–2019)

Lesley Groff
PersonExecutive assistant to Jeffrey Epstein (2001-2019)

Martin Nowak
PersonAustrian scientist

Joi Ito
PersonJapanese-American activist, entrepreneur, and venture capitalist

Marc Rich
PersonAmerican commodities trader (1934–2013)

Richard Kahn
PersonJeffrey Epstein's accountant and estate co-executor (2005-present)

Lufthansa
OrganizationFlag-carrier and largest airline of Germany

Frankfurt
LocationCity in Hesse, Germany

Larry Summers
PersonAmerican economist and government official (born 1954)

Woody Allen
PersonAmerican filmmaker, actor and comedian (born 1935)
Leon Black
PersonAmerican billionaire businessman (born 1951)

Noam Chomsky
PersonAmerican linguist and activist (born 1928)

John F. Kennedy
PersonPresident of the United States from 1961 to 1963 (1917–1963)

Bedford
LocationCounty town of Bedfordshire, England
Darren Indyke
PersonAmerican lawyer, longtime personal attorney and co-executor of Jeffrey Epstein's estate

Karyna Shuliak
PersonBelarusian dentist, Jeffrey Epstein's girlfriend and named heir to his estate
Mira Bach
PersonPerson referenced in documents

George Church
PersonAmerican geneticist, molecular engineer, and professor at Harvard and MIT
Otto Lilienthal
LocationAirport in Berlin, Germany

Harry Reid
PersonAmerican politician (1939–2021)