Why does `stringsAsFactors` use capital letters for readability in R?

Question

Why does stringsAsFactors use capital letters to aid readability in R when most other commands seem to use . (e.g., as.factor)?

Is this an idiosyncrasy or part of a higher organizaton of the commands that I am not familiar with?

Is there any way to predict which commands will use capital letters and which will use .?

Thanks

Answer 1

It is obvious -- no standard has been established before it was too late ;-)