Can Parent and Daughter co-exist?

[X99Lynx at aol.com]

In a message dated 9/14/1999 11:29:41 PM, JoatSimeon at aol.com writes:

<<Latin "died" by becoming dozens of dialects which gradually lost mutual
comprehensibility.  The process is gradual...>>

So a parent language "gradually" dies while daughter languages "gradually"
develop.  So, logically - while this "gradual" process is happening - a
parent and daughter can co-exist.  Gradually, of course.