I like this word with the meanings that I give it, below. I find 'nouse' useful and use it to encourage people and to find out more of their strengths. If you suggest that someone uses their 'nouse' to do something difficult you imply that they have sufficient of whatever that would take. That affirms strengths in that person of which you, or even they, may not yet be aware. The people that I use 'nouse' with usually seem to grasp sufficient of what I mean. That is probably from the contexts in which I use it. The full significance of what you have asked them to do may dawn on you when they demonstrate unexpected skills, or on them, perhaps as they achieve something later. My meanings use it as a singular noun. 'Common sense, your wits. "What it takes."' I also accept and commend the Urban dictionary's (www.urbandictionary.com) offering of 'practical skills', because practical skills also require good understanding.