AI Attempt: The Two Sum Trap

An intern asked Copilot to 'write a function that returns True if any two numbers in the list add up to the target'. The AI generated this beautifully readable code. It correctly returns True for ([1, 2, 3], 5) and False for ([1, 2, 3], 10). But it contains a fatal flaw.

has_pair_sum([5], 10) returns True! But there is only one 5 in the list, so there is no 'pair'.