One approach is just to set problems that ChatGPT doesn't answer correctly. I admit that I haven't tried the following with ChatGPT 4 directly, but here's an ex

One approach is just to set problems that ChatGPT doesn't answer correctly. I admit that I haven't tried the following with ChatGPT 4 directly, but here's an example of Copilot screwing up: Prompt: Write a function to swap two bigints >= 0 using only multiplication, division, addition and subtraction, without using any temporary storage. function swapBigInts(a, b) { if (a === BigInt(0) && b === BigInt(0)) { return [a, b]; } a = a * b; b = a / b; a = a / b; return [a, b]; } The fix for the zero cases is easy for a human to figure out. (E.g. add one to a and b at the beginning then subtract one at the end.)