It is highly likely that most humans will spend more time in thinking of how things cannot be done. Thought they may still have a slight belief that things maybe might turn out, it is with a hesitance, holding one's breath almost.
Possibilities thinking is the other side of the coin. It is like abundance thinking versus a viewpoint of lack.
It is seeing that there are all sorts of possibilities and if one doesn't work then trying another.
Will it meet the "truth" test or is it just airy fairy thinking? It is absolutely true that there are lots of possibilities at all times. Think of it and you'll see that that has to be true.
Yes, there are obstacles and failures, but those are only in the area of a few possibilities not quite working out, but there's lots more left.
Brainstorming