For fact and wondering there are no opposites

For most things, there is an opposite, in common parlance.
For example, for 'good', there is the opposite of 'bad'...
For 'truth', there is the opposite of 'lie'...And, so on..

But, in common parlance, there is no opposite for the noun, 'fact'.
Similarly, in common parlance, there is none for the verb, 'wondering'.
Incidentally, the query from our 'wondering' is 'Can this be a fact?'
connects the noun 'fact' and the verb 'wondering'.