Determining if a pair of integers in a list sums to a target value

This problem asks whether a given list of integers contains a pair of numbers whose sum equals a given target value. For example, if the list is [1, 2, 3, 4, 5] and the target value is 6, the answer would be True (1 + 5 = 6).

A.I. Evaluation of the Solution

This is a great solution! The candidate has thought through the problem and come up with an optimal solution.