first-order-logic

How do I write the lark grammar for First Order Logic with Equality? Question: According to AIMA (Russell & Norvig, 2010) this is the BNF grammar for FOL with Equality: How do I convert this to a lark grammar? Specifically, how do I represent n-ary predicates using lark grammar? Asked By: daegontaven || Source Answers: …

What are `lexpr` and `ApplicationExpression` nltk? Question: What exactly does lexpr mean and what do the folloring r’/F x.x mean? Also what is Application Expression? from nltk.sem.logic import * lexpr = Expression.fromstring zero = lexpr(r’F x.x’) one = lexpr(r’F x.F(x)’) two = lexpr(r’F x.F(F(x))’) three = lexpr(r’F x.F(F(F(x)))’) four = lexpr(r’F x.F(F(F(F(x))))’) succ = lexpr(r’N …