Thus we say: You never know, which is why. but You never know. That is why.
Understanding the Context
And goes on to explain: There is a subtle but important difference between the use of that and which in a. Why is used here as an interjection. According to Merriam-Webster: —used to express mild surprise, hesitation, approval, disapproval, or impatience <why, here's what I was looking for>. Nov 7, 2013 · The question is: why did the English adapt the name pineapple from Spanish (which originally meant pinecone in English) while most European countries eventually adapted the.