[a fool in paradise]

You’d think that genetic differences would be detected in some patient some day (who may or may not know of his or her past heritage)

Also more species means more diseases we may have no history with.

[RoosterRedux]

Based on what the abductees have said (to David Jacobs, for example), hybrids on this planet have an elaborate support structure and each hybrid knows full-well that it is a hybrid...and knows its job (whatever that is).

Whatever is behind this scheme is purportedly quite intelligent and wily.

As an aside, we don't know what is true about any of this stuff. But as John Mack, Harvard Medical School prof and psychiatrist (now deceased), has said, something is going on here, we just have to figure out what.