chris_chi24 said:Almost every unanswerable question in these threads is unanswerable because three things changed in the same fortnight, and no amount of subsequent…
Coming at chris_chi24’s question from a different direction. Whatever the answer turns out to be, the method for getting there is the same: state the assumption, do the arithmetic in public, and invite the correction. That is slower than asserting, and it is the only version that survives being wrong.