So "ska" is "should" and not just "will"? Or rather, that it has a value judgement, and not just intention?
I'd say the intention in it is so strong it sometimes takes on the meaning of a value judgement. There's no 1-1 correspondence here.
I tend to think of it as shall rather than will
Shouldn’t ‘hur ska’ be pronounced with a retroflex?
It's usually pronounced like that, but the TTS doesn't do it. Some native speakers say it the way the Voice does too.
Strange that is recommends How should 1 define it? with a number instead of "one"
How should 1 define it?
That's an unintended feature of Duolingo accepting "1" for "one".
I can't stop laughing rn
Why isnt how will one define it accepted?
Please have a look at Arnauti's reply above.