In that case, in order to halve the size of the lexicon holding the set of strings to be « interned ».
The aim of this table lookup is to make sure that if the words « the » or « a » appear a million time in a large corpus of text, they all point to the same value. Example: <https://medium.com/@bdov_/https-medium-com-bdov-python-objects-part-iii-string-interning-625d3c7319de>
