Answer: When is it appropriate to use "which" vs. "that"?

[katiefoolery]

t_verano poses an interesting question: When is it appropriate to use "which" vs. "that"? What is the appropriate comma use in each situation?

Is there, in fact, a distinct rule that applies to this situation? Or does it depend entirely on mood, which can change from one moment to the next?

Comments

[sidlj]

I found a great, easy to remember quote somewhere when I was researching this very subject a couple of weeks ago:

When you want to clarify 'which', use 'that'.

[katiefoolery]

I like that one! Very easy to remember.