What is the difference between an opinion and an assessment, an observation, a statement, a theory, a hypothesis?

Many people use one word for many different things…

I have this “friend” who climbs the same steps I climb, except that he climbs it seven times each time, I climb it once or twice. He is a little younger than me.

I am fond of him: he is one of the handful of people I regularly talk to, eye to eye.

I often walk with him as he walks home: I guess I am hungry for human companionship: 10-20 minutes at a clip.
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