Is there a reason why some questions have question marks and other don't?


In many things I read question marks are used after what is obviously a
question, but sometimes they are not used (even though it is the same person
who wrote it).

Is there a reason why, even stuff written by the same person, can be so
inconsistent with regards to questions having question marks?




I would say that if the "ka" is used, then a question mark is unnecessary,
unless it is used as a courtesy to foreigners reading it. One user may forget
to use it sometimes because they are not used to using it at all in their
native language. What source are you looking at for someone using/not using
it? It might help slightly with a better answer.

