Book,  Chapter

 1      I,  II   |       think is very much to be doubted. And, therefore, I imagine,
 2      I,  III  | propositions that could not be doubted of as soon as understood,
 3     II,  I    |       appeal to mankind. It is doubted whether I thought at all
 4     II,  XI   |     abstract not. If it may be doubted whether beasts compound
 5     II,  XXIII|        and therefore can it be doubted? The matter of fact is clear,
 6     II,  XXXI |       it amiss if it should be doubted whether he called himself
 7    III,  III  |     way, yet I think it may be doubted whether it be the best.
 8    III,  III  |     having been more than once doubted, whether the foetus born
 9    III,  V    |      too sensible proofs to be doubted; and we shall find this
10    III,  XI   |     Though yet it be not to be doubted that spirits of a higher
11     IV,  XI   |      This is too evident to be doubted: and therefore we cannot
12     IV,  XII  |   without suffering them to be doubted of, because mathematicians