> Fear that they don’t know what to code or where to start.
Not really a big deal, both don't know, and it's not about fear. Sometimes, we just laugh at each other, it's rather kind of funny.
> Fear that others will laugh at their solutions.
It's about one side blocks the other, make it slow, most of the time I have a good solution in mind already, but my politeness let the other runs, when he stuck I got a chance to interrupt "can we try this blah blah" and it's done this time.
> Fear to don’t succeed in public.
Not a big deal, no serious work is done during pair, it's for getting mutual understanding / agreement on something, just to make sure we are on the same page. The rest of work is done in isolate.
> Fear to not be able to develop the expected solution for multiple reasons: misunderstanding the task or lack of knowledge.
This one is true, I saw my team mate swam through randomly. It's ok, that's why pair programming is sometimes pointless.
> Fear to change your mind in front of others.
That's a sign of good thing is happening, something is getting more practical.
> Fear to discuss and make decisions loud.
People rather like this, shit talking like discussing works on tea table.
> Fear of disagreeing with others.
This is why pair programming is half-point, short-time debate is poor quality. Think longer, asynchronously, more research, and write disagreement in long form text .. on pull request.