How can you tell?
When you see it... Page 3
By looking with my eyes!
Quote: Chappers @ April 4 2011, 4:02 PM BSTHow can you tell?
You need to squint a bit. Once you do see it, it becomes quite clear. If squinting or trying different angles doesn't work, try covering the top half of the pic with a piece of paper, you'll crack it then.
Edit to say I preferred Zooo's answer 
Ooh. Sarah Silverman has just blown my mind... http://twitter.com/SarahKSilverman/status/54925726348087297
A good one here
the text on the pic spells out the word 'liar'
Quote: Gerry McDonnell @ June 20 2011, 11:54 AM BSTA good one here
I see a portrait of a man. Am I missing something else?
Quote: David Bussell @ June 20 2011, 11:56 AM BSTI see a portrait of a man. Am I missing something else?
You are, I'll add little text underneath the original pic
Done.