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From:     GLR@MIT-AI
Date: Sat, 13 May 79 23:40:55 GMT
Original-Date: 05/13/79 19:40:55 EDT
    Now that comma has been gobbled as a character for
    the backquote read macro, why don't we make a comma
    that is outside a backquote just mean eval the next
    sexpr (ie. a #, on the LISPM).

If you did that, then you couldn't get a read-time evaluation within
a backquoted form.  The two ideas (, within ` and comma without it)
are only superficially similar, and the mechanisms should be orthogonal.