I (Jared Wigmore aka JaredW) have recently implemented a general forward chainer for PLN. (See Forward and Backward chaining on Wikipedia). Joel had previously implemented a prototype forward chainer, but it only supported deduction. PLN has a wide variety of inference rules. They each require different sorts of input atoms, and so a forward (or backward) chainer for PLN needs to be able to find appropriate atoms for each inference rule. There's a new 'pln fc' command, in the CogServer shell, w More

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