I wrote (31 May 2006 14:45:08 -0700):

... Now, I will submit this note, and we can all see if google
records it as
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"In-Reply-To: xJefg.77$Cw3.65@trndny01
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(I am submitting it in reply to Phil Innes) or as:
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"In-Reply-To: "
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(the michael adams note that was the source for my big quote).
Nobody has to trust me on this. Anyone can devise a test and
see for themelves what is recorded by the google "In-Reply-To"
feature.

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Well the test is now done, and, as anyone can check for
themselves, my 31 May 2006 14:45:08 -0700 note was
recorded by google as:
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"In-Reply-To: xJefg.77$Cw3.65@trndny01"
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That is the Message-ID for the Phil Innes note to which I was
replying. What a surprise.