In one sentence, in the first minute of two guys sitting on the couch, Gabriel Weinstein ( creator of DuckDuckGo ) clarifies the jargon.
"A mental model is a 'concept'.
A shared concept is something we all understand. There are some concepts we don't share.
Understanding a concept / mental model does not make it usable just because you understand it. Using concepts requires that you understand and practice other concepts. Think about learning how to paint. There is some skill involved.
'Unforced errors' comes from tennis. You make the error on your own. If you can make fewer errors, you'll be better off.
First principles: Is just throwing out assumptions. Start from scratch and try to verify that any assumptions you have are actually accurate.
How would this work in the job search? From the bottom up, you ask: you'll need some money, where are you going to work, what type of activity will you enjoy etc.
Different jobs may reveal themselves when you define the attributes
It's key if you ever want to start something.
I assume customers will want my product.
Testing assumptions is all starting a company really is.
Occam's Razor - if you have a simple concept, it might be correct and you should investigate it first.
Once you have a "name" for something, then you can recognize it out in the world.
Cognitive Dissonance: Trying to hold two conflicting ideas in your brain at once. ( It's physically painful.)
I'm going to pick up this book today. More to come. cc @keni