Ooh well this was fun!
WARNING - Slightly obfuscated spoilers below! I'll try not to make them obvious, but you have been warned!
I got almost all of them (as you'd hope) but there were a couple that I got a different answer for, or just disagree with. Also, I confess that my skin-lore is remedial at best. (If it's not core Runeterra, then I'm less into it!)
Speaking of which, I loved the geography questions, but the one for Stage 3 I strongly object to the answer! Definitely not what I'd go with. I'd have been impressed, and I would have conceeded my failure gracefully, if the answer had been the Arbormark.
I got S2.Q3 wrong, and that's just me being rubbish. No excuses - I really should have got that!
S3.Q1 I didn't know the answer and guessed, wrong, and I feel a little less bad about not knowing, but still. Could have done better.
S3.Q2 I guessed, correctly. Skin lore!!! My nemesis!
S3.Q3 I guessed, correctly, again! Not sure I have an excuse not for being more informed on that one though :(
S3.Q4 I got right, confidently, but I'm actually not sure if that piece of lore is still true, since a recent update?
S3.Q5 Correct again, but I winced at the skin-lore-ness of it. I guess I remembered slightly more than I thought I did.
S3.Q7 I got this. Not sure if it's 'real lore' or not, but I got it! Love those things.
S3.Q8 THIS QUESTION. I disagree that it's home. See above.
As for my answer to the final question, I'd say that there is never one, without the other. (This isn't an official Rito answer - just my own take!)