Last year, a software company held a contest to generate ideas for their new logo. According to the rules, everyone who entered the contest would receive several prizes, including a T-shirt with the company' s new logo. Juan has a T-shirt with the company' s new logo, so he must have entered the contest. The reasoning in the argument is flawed in that the argument ['infers that every member of a group has a feature in common on the grounds that the group as a whole has that feature', 'takes a condition that is sufficient for a particular outcome as one that is necessary for that outcome', 'infers a causal relationship when the evidence only supports a correlation', 'has a premise that presupposes the truth of the conclusion']