Abstract

In this case (5) yields the result that A and D are I-related, but neither is I-related to B or C – the original person has two beginnings of existence. To get round this we need to add to (5)’s right-hand side the condition that there is no pair of distinct, simultaneously occurring person-stages u and v such that u is R-related to x and y and v is R-related to x and no pair of distinct, simultaneously occurring personstages u and v such that u is R-related to x and y and v is R-related to y. In fact this condition can replace (iic) on the RHS of (5).