Comment Fonts have NOT already solved that problem! (Score 2) 391
Fonts have not solved this problem, and the problem has actually gotten worse now that one-space-at-the-end-of-sentences has become the status quo.
We were told twenty (thirty?) years ago that computer typography would solve this problem, but that has not happened, even though the teaching and convention has changed. Fonts just add extra space after all periods, including inline abbreviations like Mr. Sure, higher-end desktop publishing knows the difference in-line periods and end-of-sentence-periods, but that has become less of what we read, and word processing and web browsers never did pick up on the difference. So it was up to us grognards to manual add the extra space.
Shame on this study for using a fixed width font for testing. The improved readability of large blocks of text with a little bit of extra spacing between sentences is quite obvious. You fools advocating for single-space-after-end-of-sentence-periods should experiment for yourselves (with a print page using proportionally spaced text). We have been sold a bill of goods.