If language A has an operator for removing spaces from strings and language B doesn’t, that probably doesn’t make A more powerful, because you can pr… - Paul Graham

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If language A has an operator for removing spaces from strings and language B doesn’t, that probably doesn’t make A more powerful, because you can probably write a subroutine to do it in B. But if A supports, say, recursion, and B doesn’t, that’s not likely to be something you can fix by writing library functions.