Those who understand binary; those who do not; and those who are bemused that this is actually a trinary joke.
Seriously, bridget? you say. You haven’t blogged for a week and now you’re giving us trinary jokes? Okay, sorry dear readers, but I’ve been busy. I’ll throw in my favourite chemistry joke to make it all better: Q: Why did the white bear dissolve in water?
A: Because he’s polar!