Re: virus: SM

David McFadzean (
Sun, 28 Sep 1997 12:43:25 -0600

At 01:50 PM 9/27/97 -0700, Tim Rhodes wrote:
>BING! (sound of lightbulb going on)
>I see--if all descendents have a common ancestor, then all ancestors have
>common descendants, because the only isosemantic "ancestor" will be the
>one from which a descendants are... well,... descended.

I don't think so. If all humans have a common ancestor, then the reciprocal
relation is only that the one common ancestor has all humans as his or her
descendants. You can't infer anything about all ancestors from the original
statement. (X is an ancestor of Y iff X appears in Y's genetic lineage.)

David McFadzean       
Memetic Engineer      
Church of Virus