For a long time, psychologists have supported the "mathematical talent theory"; mathematical ability is the ability that humans have from birth, even animals have this ability. They believe that there is a natural mathematical kernel that develops slowly through the self. This kind of mathematical kernel will eventually "grow" into all the mathematical abilities we are familiar with. Recently, some opponents have put forward different views; mathematical abilities have no talent and can only be the product of culture. Which of the following, if true, would best support the opponent's view:. ['Babies from 10 to 12 months already know that 3 black dots are different from 4 black dots.', 'Mathematics is the product of the brain, and the growth pattern of the brain has long been "preset" by genes.', 'Artificially trained gorillas, dolphins and elephants can handle mathematical problems.', 'The majority of the residents of the primitive tribe can only represent a number below 5 or even less.']