Full Idea
An example of the Strengthened Liar is the following statement SL: 'Either SL is neither-true-nor-false or it is not true'. This raises a serious problem for any theory that assesses the paradoxes to be neither true nor false.
Gist of Idea
Strengthened Liar: either this sentence is neither-true-nor-false, or it is not true
Source
Anil Gupta (Truth [2001], 5.4.2)
Book Reference
'Blackwell Guide to Philosophical Logic', ed/tr. Goble,Lou [Blackwell 2001], p.109
A Reaction
If the sentence is either true or false it reduces to the ordinary Liar. If it is neither true nor false, then it is true.