Meaning of でも in this sentence

Question

I stumbled upon the following sentence in the J-drama "Mother".

書けない理由でもあるの

A teacher is talking to a student who isn't doing an exercise. I'm aware that the teacher is asking whether there is a reason why the student can't do the exercise. But what is the でも doing there? I would understand a が.

score 4 · Accepted Answer · edited Oct 17 '16 at 19:34

4

Do you have a reason or something why you can't write it?

From Wiktionary, the 5th definition, "or something".

edited Oct 17 '16 at 19:34

answered Oct 17 '16 at 19:28

ishikun

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I wasn't aware of that usage of でも. Thank you! – chinpunkanpun Oct 17 '16 at 19:40

Meaning of でも in this sentence

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