They're not certain

Usage examples of maybes.

Did Professor Spargrove happen to have anything in his hands when he mentioned seeing these maybes, as you call ‘em?

Hummfree decided to quit worrying about the maybes and continue to search north for a few more kilometers before broadening his search track to the sides.

She wished that Mirya were still with her: she had some questions to ask her about maybes and about might-have-beens.

If the hand moves, the maybes will be answered—and some maybes are less attractive than others.

But all the maybes and probablys and could-bes in the world won't convince a politician with hungry people to feed—"