A Google Groups alternative to rec.aviation.piloting?

buttman writes:

I'm criticizing people not backing up their claims with fact.

Yes, you're criticizing people. That's not a discussion of aviation.

Statements made by anyone can be evaluated on their own merits, without any
reference to personalities or the people making the statements. Facts are
facts; falsehoods are falsehoods. It doesn't matter where they come from.
Statements can be verified by comparison with other sources of known accuracy.
There is never any need to worry about who made the statements.

In that post I'm challenging him to back up his claims with fact.

Either he is right, or he is wrong. The old saw about backing claims up with
facts is just a diversion tactic, and a poor one at that. If he is wrong,
correct him. If he is right, let it stand.

And his reasons for me being the worlds worst instructor I think is very
aviation related.

No, they are personality related. Exactly the type of thing that you were
criticizing just a few posts ago.