If it is not reasonable that someone would assume 01931 is a truncation of some figure where some nonzero digits are implied, why is it reasonable that someone

If it is not reasonable that someone would assume 01931 is a truncation of some figure where some nonzero digits are implied, why is it reasonable that someone would assume that about 1931? (And that adding a 0 fixes it?) How about this: 1931 is a complete decimal integer requiring no further adornment.