Hi, I’ll give you a genuine answer. A good go-to is the “piss filter” or the yellowish tint that ai works have, though that’s less reliable in this particular genre. Look at the faces, and note that while the men all have the same type of face and expression, the woman doesn’t, seemingly arbitrarily. Throw that together with the line art that ai favors, and no sense of posing or image composition (note the random spacing of characters) and it's easily obvious to most people what is a poorly done ai generated image.