2
votes
2answers
15k views

“To which extent?” vs. “To what extent?”

Is there a difference in meaning between "to which extent" and "to what extent"? Are they used in different geographical areas?
38
votes
2answers
131k views

“Which” vs. “what” — what's the difference and when should you use one or the other?

Most of the time one or the other feels better, but every so often, "which" vs. "what" trips me up. So, what's the exact difference and when should you use one or the other?