Full Idea
Berry: if we take 'x is a natural number definable in less than 19 words', we can generate a number which is and is not one of these numbers.
Gist of Idea
'x is a natural number definable in less than 19 words' leads to contradiction
Source
Graham Priest (The Structure of Paradoxes of Self-Reference [1994], §3)
Book Reference
-: 'Mind' [-], p.29
A Reaction
[not enough space to spell this one out in full]