Quote:
Originally Posted by angliholic  Our problem lies not in what to do but in how to do it.
Is the underlined "in" optional? If not, why not? If yes, why yes? Thanks. |
I don't think it's optional. Take out the first phrase (and the conjunction, "but") and you have:
Our problem lies in how to do it.
That makes sense. If you take out the "in" it doesn't make sense.
~R