The theory of the evolution of man is based on suppositions and inferences. As an example, the first chapter of Charles Darwin’s book The Descent of Man contains within a few pages, 20 expressions of uncertainty, such as “seemed,” “it appears,” “take for granted,” “may,” and “implies.” The concluding chapter of 14 pages has more than 50 such expressions. Within 30 years after publication the book was changed in 87 places to hide the appearance of uncertainty. Several edited editions were published after the writer’s death.