Phenomenologically, humor is a distortion of the general logic of things, but it must be a reflection of conscious rationality. It cannot be separated from human normal thinking and healthy psychology, so humor is a reflection of human health psychology. Based on the above statement, which of the following conclusions can be derived? ['The essence of humor is to connect irrelevant things, make them logically confused and produce comedy effects.', 'The logic involved in humor is often different from normal logic.', 'Humor requires rich imagination.', 'Human normal thinking and healthy mentality constitute sufficient conditions for humor.']