You're not dumb, just blind. Okay, maybe you're a little dumb, too. 

 

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Source: cheezburger

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Source: aaanything

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Source: izifunny

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Source: moillusions

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Source: izismile

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Source: philadelphia.cbslocal

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Source: funnyjunk

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Source: quinnj86

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Source: dumpaday

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Source: izifunny

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Source: Jean_Luc-Discard

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Source: Centuron

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Source: uberhumor

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Source: adeevee