While pronouncing xor as ‘ex-or’ makes sense, since the x stands for ex-clusive, most words in English that start with x make the ‘Z’ sound. Xenophobe, xylophone, xanax. But once again, the regular ‘or’ in English is already exclusive, so there’s no need to make a new word for it, but I admit it would be fun.

Yes, it depends on the tone, which dictates whether it’s rude or inquisitive. This is how I see it.

Why would you SAY that? = what you’ve said is shocking or offensive.

Why would you say THAT? = one wants to know more about that.

Filler words is the most correct answer because words like “like” do actually have meaning, but there is also something called embololalia (also spelled embolalia), the insertion of meaningless sounds/words into speech, which would include “uh, ah, mmm,” etc.

You’ve proven to me that the em dash is a bit of a Swiss army knife indeed; you didn’t, however, have to diss my boy, the semicolon!

Not only does his design make logical sense for his specific job, but he also takes up no more space than a comma.