Question

who can challenge the will of god(Assertive sentence)

Answer 1

someone willl challenge God.
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Answer 2

Assertive statement which declares a statement with feeling, opinion, event, history, etc.

It shows strong and distinctive characteristics and and assertive behaviour.

Assertive statement can be either negative or affirmative.

No one can challenge will of god is the assertive statement of who can challenge the will of god.

Thus, assertive statement is a sort of declaration.