Biomedical Admissions Practice Test

Answer: D - By questioning the validity of Ann’s premise that “All politicians are corrupt.” Ann’s premise that “All politicians are corrupt” is her major premise that has general application to all politicians. Samuel’s proof regarding the Congressman undermines Ann’s major premise because the Congressman is politician, but is not corrupt, bringing into question the validity of Ann’s major premise. Answer C is not the best answer because Samuel has not proven that Senator Miller is not corrupt, even though Samuel’s undermining of Ann’s major premise makes her conclusion less certain. Answer A simply repeats Samuel’s proof. Answer B is not correct because Samuel has not proven that Senator Miller is not corrupt.