Full Idea
Lewis's strategy for defending extreme haecceitism is that supposed impossibilities (that I might have been a poached egg) could be reconstrued as genuine possibilities that are so remote from reality that they are ignored.
Gist of Idea
Extreme haecceitists could say I might have been a poached egg, but it is too remote to consider
Source
report of David Lewis (On the Plurality of Worlds [1986], 239-) by Penelope Mackie - How Things Might Have Been 9.3
Book Reference
Mackie,Penelope: 'How Things Might Have Been' [OUP 2006], p.155
A Reaction
Not a promising route. Wiggins asks: if you think I could have been a poached egg, start by defining more precisely this 'I' to which we are referring. The definition will blatantly exclude any possibility of my poachedegghood.