eductive consequence of two links. This function then invokes a function of the form TruthValue PLNDeductionFormula(TruthValue tAB, TruthValue tBC, TruthValue tA, TruthValue tB, Truth which in turn invokes functions such as SimpleTruthValue SimplePLNDeductionFormula(SimpleTruthValue tAB, SimpleTruthValue tBC,