It is generally believed that tsunami can be predicted through the abnormal behavior of animals. This view is based on subjective analogies and may not necessarily reveal objective connections. A cat behaved abnormally 24 hours before the tsunami and impressed its owner. At any moment in this world, cats behave abnormally. To comment on the above argument, which of the following questions is the least important? ["Has the animal's abnormal behavior considered to be a precursor to the tsunami also occurred in ordinary times?", 'Are the two different types of animals similar in behavior before the tsunami?', 'What was the proportion of animals with abnormal behavior before the tsunami in the whole animal?', 'What percentage of animals that had abnormal behavior before the tsunami were not noticed?']