The easiest way to determine the number of the verb is to take out the dependent clause.
Would you say "Some people are abortion supporters," or "Some people is abortion supporters"? Based on the above, we conclude that "some" is plural. Therefore you would say "Some are true," or "Some of the charges are true."
As to my question, would you say "Some people are abortion supporters," or "Some people is abortion supporters," the correct answer is c) "Some people is just plain stupid."
;)
Shalom.
Warriner's English Grammar and Composition: Correct agreement rule 6f. "The pronouns some, all, any, most and none, may be either singular or plural....These words are plural if they refer to a number of persons or things; they are singular if they refer to an amount, or quantity of something.
SINGULAR:Some of the cargo was lost. (a quantity)
PLURAL:Some of the books were damaged.(a number of books.)