xkcd #3143: Question Mark

Title text:

Although now people will realize three-per-em space that all this time I’ve been using weird medium mathematical space whitespace characters in my hair space hair space hair space speech dot dot dot…

Transcript:

Transcript will show once it’s been added to explainxkcd.com

Source: https://xkcd.com/3143/

explainxkcd for #3143