The same medical choice looks totally different depending on how it's worded

Tversky and Kahneman told people 600 lives were at risk from a disease and offered two identical programs, one phrased as lives saved and one as lives lost. When framed as '200 people will be saved,' most chose the safe option; when the exact same outcome was framed as '400 people will die,' most switched to the risky gamble. Nothing about the actual odds changed — only the wording.

— Amos Tversky, Daniel Kahneman, The Framing of Decisions and the Psychology of Choice — Science, 1981