Is it normal to become less smart during a phase?

Certain periods of an year, or generally in cycles, I have this duration where I just become less-smart/dumb. Things have to be repeated to me to understand, and I've a problem following things and using my mind.
However, majority of the year, contrary to the above happens. And I'm smart and have great analyzing ability.

Is it normal :/?

Voting Results
79% Normal
Based on 24 votes (19 yes)
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Comments ( 4 )
  • Legion

    I feel like this at times, although It seems to happen to me at random times

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  • squirelhunter

    Mabey cause you use it during a certain time. So lets say u go to uni or something. So during the holidays you will be using it less so therefore you don't feel as smart as you would when you are using it.

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  • dappled

    If it's always the same time of year, I guess it could be something to do with seasonal affective disorder.

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  • bananaface

    Maybe the sun is melting your brain like it is mine.

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