A scientific study found that regular use of the left hand can better exercise the right brain, which enhances the person's image thinking ability and is more conducive to the development of creative thinking. However, it turns out that the proportion of left-handed people in inventors is not high. Therefore, this science The conclusions of the study are not credible. Which of the following can weaken the above conclusions most? ['The right brain can also be used to exercise the right brain.', 'The number of right-handed people far exceeds the number of left-handed people.', 'Invention and creativity rely on talent rather than exercise.', 'Inventions do not rely on imagery thinking.']