For A Certain Base, $b, \log _b 8=3$ And $\log _b 0.5=-1$. The Value Of $\log _b 4 B$ Is

Sure, certain, positive, cocksure mean having no doubt or uncertainty. Certain may apply to a basing of a conclusion or. See examples of certain used in a sentence.

If you are certain about something, you firmly believe it is true and have no doubt about it. If you are not certain about something, you do not have definite knowledge about it. I am certain that he wrote a book.

It is certain that they were on the bus. 3 days agocertain (comparative more certain or certainer, superlative most certain or certainest) sure in one's mind, positive; As, he is certain to be there to-morrow.