Do not textbooks present evolution as fact?

“Many scientists succumb to the temptation to be dogmatic, . . . over 
and over again the question of the origin of the species has been 
presented as if it were finally settled. Nothing could be further from 
the truth. . . . But the tendency to be dogmatic persists, and it does 
no service to the cause of science.”—The Guardian, London, England, 
December 4, 1980, p. 15.