In the cases that I've seen, the PDF software does not generate text strings. It generates individual letters. It is up to any application to try to figure out how those individual letters relate to one another.

Did you even read my comment? The "application" is called pdftotext, and instead of putting the individual letters on a bitmap, it puts them in a string literal.

I do not understand why you insist on being polemic to win an internet argument, when I'm giving you all the tools to win the internet argument by virtue of being correct.

I did read your comment, because my intention here is to learn. I already described how tools such as pdftotext do not produce strings when each letter is positioned independently. I even gave an example of a few replies up.