Hence vs Therefore in casual conversation

Trying to be concise, I have been using hence instead of therefore for some time.

In the context of a casual conversation, which should be used (and why)?


Actually, depending on the parlance of your peers, either is acceptable as long as they don't look at you funny when you use either word. You can also use "so", for example:

"I have a headache, therefore I'm not going to class tonight."

"I have a headache, hence I'm not going to class tonight." (this sounds odd to me)

"I have a headache, so I'm not going to class tonight."