# Tweet by [@keefmoon](http://twitter.com/keefmoon) on 2011-12-28 18:19:16 > [!INFO] Archived from [original tweet](http://twitter.com/keefmoon/status/152091260600074240) In reply to: [@EmerMcCourt](http://twitter.com/EmerMcCourt/status/152090500768337920) @EmerMcCourt @profbriancox has done a great job of explaining the uncertainty principle. Never got it before now it makes sense.