more from Roderick Chisholm

Single Idea 11965

[catalogued under 10. Modality / E. Possible worlds / 3. Transworld Objects / a. Transworld identity]

Full Idea

If Adam lived for 931 years in a possible world, instead of his actual 930 years, ..then Adam and Noah could gradually exchange their ages and other properties...and we could trace Adam in a world back to the actual Noah, and vice versa.

Gist of Idea

Could possible Adam gradually transform into Noah, and vice versa?


Roderick Chisholm (Identity through Possible Worlds [1967], p.81-2)

Book Reference

'The Possible and the Actual', ed/tr. Loux,Michael J. [Cornell 1979], p.81

A Reaction

[very compressed] Chisholm was one of the first to raise this problem for possible worlds, though it had been Quine's objection to modal logic all along. Only Adam having essential properties seems to stop this slippery slope, says Chisholm.