Final answer:
The result of unification of Eats (David, x) and Eats (x, Apple) with the substitution [x/David] would result in the unified statement Eats (David, Apple), which means David eats an apple.
Step-by-step explanation:
The question asks about the result of unification applied to two logical statements: Eats (David, x) and Eats (x, O [x / A * pple]NilFailO [x/David] Apple). In logic programming and computer science, unification is an algorithmic process that attempts to identify a substitution that makes two logical terms identical. Assuming that by O [x / A * pple]NilFailO [x/David] Apple you mean some form of term transformation or substitution, the goal would be to find a substitution for 'x' that satisfies both statements.
In this case, unification can replace 'x' with 'Apple' based on the given substitution [x/David] since 'David' is eating something ('x') and that something is 'Apple'. Therefore, the unification would be successful, and the unified statement would be 'Eats (David, Apple)' indicating that David eats an apple.