be careful what door you walk through

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Received in email this article, suggesting that walking through doorways -- literally -- causes forgetfulness.

I'm not sure how specious the reasoning is, but the vaguely-magical quality of the assertion and experiments appeals to me.

And it makes me wonder whether, if I walk backwards through all the doors I have been through, I would thereby remember all the things I had forgotten by walking through them in the first place ... and what impact that would have on all the new information I had gleaned by walking though: Would I thereby forget that I had forgotten?
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