Post-occupancy surveys and/or interviews are a common tool used in architecture to evaluate the success of buildings. They can be very useful and should be implemented as long as architects do not expect or claim too much from them. Much has been said of their benefits, but it is concerning to see some architects present them as some kind of scientific proof of a design’s success or failure. Although I am a strong advocate for post-occupancy surveys, I think a little pushback is necessary. A brief review of their methodological weaknesses should make any architect pause before claiming a survey has vindicated their ideas.