Question

Effective argumentationanticipates an opponents

Answer 1

Assuming you're saying
effective argument anticipates opponents, as in your arguments bring other people to come argue with you

If you're just writing about it, saying you're opinion, you could say

Yes, effective arguments brings many opponents to challenge your ideas/theories, for many reasons, such as wanting to just prove you wrong, wanting to discuss the topic with you, etc.
If you want to say no, then you could say that effective arguments are called effectiv e arguments because they are thorough and to the point, so there is little left to be said