What is misleading about a commercial that claims "scientific proof" that laundry detergent X is better than another leading brand?

Question

Answer

We do not know whether the same amount of each detergent was used for washing.

Answer

All of the answers

Answer

We are shown only one shirt becoming whiter for each detergent, not 20 shirts for each detergent (lack of repetition).

Answer

We do not know if everything besides the detergents was the same (machine used, type of stains, etc.).

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