Is this sentence wrong for the simple reason of lack of a predicate? If a sentence does not have a verb, it probably doesn’t have a predicate. Why is there no verb in the above sentence?

In informal writing, this sentence would likely be fine, if the surrounding context provides an obvious predicate. For example, the context could be:

“All the superheroes were in the meeting place. Why.” All except Storm. ” (Apparently Storm is a superheroine)

The first sentence above implies that the predicate is “were at the meeting place”. As explained, the predicate is “at the meeting place”

What does that mean when someone says “All

the superheroes except Storm were at the meeting place.” “I

believe in the power of silence. “. “