A reasoning flaw that infers a property of an individual part from a property of the whole — assuming that what is true of a group as a whole must be true of each member of the group. Classic LSAT example: "Ms. Tarnowski's class collected more aluminum cans than any other class; therefore, the student who collected the most cans in the entire school must be in her class." The fallacy ignores that a group's aggregate property (highest total) can be produced by many moderate individual contributors and need not reside in any single member.