Certainly you have made an abominable assertion

Which of the following best describes a counter example to the assertion above.

What about the D.A.'s assertion that your son got his marijuana from you?

But how many of you would be able to make a confident assertion about a piece of classical music?

He give a name, said Mrs. Hall an assertion which was quite unfounded but I didn't rightly hear it. She thought it seemed so silly not to know the man's name.