# Question: Write down a logical sentence such that every world in

Write down a logical sentence such that every world in which it is true contains exactly one object.

## Answer to relevant Questions

Consider a symbol vocabulary that contains c constant symbols, predicate symbols of each arity k, and fk function symbols of each arity k, where 1 < k < A. Let the domain size be fixed at D. For any given ...Rewrite the propositional wumpus world facts from Section 7.5 into first-order logic. How much more compact is this version?Extend the vocabulary from Section 8.4 to define addition for n-bit binary numbers. Then encode the description of the four-bit adder in Figure and pose the queries needed to verify that it is in factcorrect.One might suppose that we can avoid the problem of variable conflict in unification during backward chaining by standardizing apart all of the sentences in the knowledge base once and for all. Show that, for some sentences, ...In this exercise, we will consider the implementation of search algorithms in Prolog. Suppose that successor (X, Y) is true when state Y is a successor of state X; and that goal (X) is true when X is a goal state. Write a ...Post your question