The one who expands possibilities is a Ne base or Ne Role. When I present a possibility I like to my Ni mom, the first thing is for her to use her P function to focus on theories that might exist beyond the one I've chosen of the possibilities I find interesting; the premise is that "well, there can't be only one right answer" to and Ni type.
Actually, you might be able to choose the best corse of action NOW, if what you're focusing on is Time and the best/advantageous action; this actually helps Se types very much, who by the way, are good at presenting possibilities, with their Ne role, and prefer you to pick the one to do. They have Se and would rather and even can do it all.