I know it originates from head shrinking, but it doesn't help me a lot to understand the etymology.Why are psychiatrists called that?Is it like my head is swollen [from anguish, misery, stressI don't know why, but it seems to me that bob would sound a bit strange if he said, why is it that you have to get going? in that situation.Thus we say:You never know, which is why but you never know.That is why and goes on to explain:
The Power of ‘Why’ in Safety - EHS Daily Advisor
The Power of ‘Why’ in Safety - EHS Daily Advisor

The Power of ‘Why’ in Safety - EHS Daily Advisor of Why Did William Afton Kill Kids? This Evidence Will Keep You Up At Night. .

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There is a subtle but important difference between the use of that and which in a sentence, …Good explanation of why it's optional in this case, although i'm not convinced that reason is the only reasonable antecedent of why.For example, the explanation why is a common usage, and i don't …