Pondering the Unknown

He's trying to figure out if the answer is obvious or if he needs to look harder, like someone left the question in the middle of a conversation and now he's picking up the pieces

This person is caught between being polite and being honest, like when you ask a friend what they think about your new look and they just stare at you with this face

It could mean someone is thinking through all the possible meanings of what was just said, like when a joke is explained and you're still not sure if it was funny or just weird

Someone might be using this face when they're trying to decide between two choices, like choosing between work and family time or picking between two projects that mean a lot to them

This could be how a person looks when they're trying to remember if they were told something important or if they just imagined they were, like when you think someone promised to call but you're not sure