Passage Summary: In a study, images appeared mostly at the top of a screen and occasionally at the bottom. People tried to guess the location by looking for patterns, but they were wrong more than half the time. If they had just guessed 'top' every single time, they would have been right more than half the time.

Reasoning: No reasoning (Fact Set).

Analysis: We are looking for a mathematical certainty based on the provided facts. We know two things: first, the images appeared at the top more than 50% of the time (otherwise guessing 'top' wouldn't be right 'most' of the time). Second, the subjects' 'pattern' strategy was less successful than the 'always top' strategy. This implies that the subjects were guessing 'bottom' more often than the images actually appeared there, or they were guessing 'top' at the wrong times. Look for an answer that synthesizes these frequency facts into a definitive statement about the subjects' guesses or the image distribution.