I don't expect anyone here to defend strong scientism,
Excellent!
No need to look for things you don't expect. I don't expect to find $7.5 million in my linen closet, which saves me the time it would take to search that closet 250 times a day.
and I'm not trying to persuade anyone to accept my position.
Excellent!
You aren't trying to persuade, so there's no need to give a second thought to whether you've persuaded anyone or could persuade anyone.
I'm interested in examining the claim itself.
Then examine the claim itself. There's absolutely no need to confuse yourself by wondering whether anyone actually believes the claim. That's completely irrelevant to your examination of it.
My basic objection is that the success and reliability of the scientific method do not, by themselves, establish the stronger claim that scientific knowledge is the only valid form of knowledge.
To what are you objecting?
Are you objecting to the idea that success and reliability establish a stronger claim that yada yada?
Are you objecting to the idea that success and reliability do not establish a stronger claim?
Either way, the nature of your objection might help you to form your own opinion on the subject. You should put more effort into forming your own opinion, and stop wasting all the effort you've been putting into finding someone to form your opinion for you.
If you can't find an actual human who's willing to form your opinion for you, you could ask your AI assistant to tell you your opinion. That would keep both of you occupied in a more productive activity, and might amuse the AI.
That stronger claim is an epistemological claim, and that's the part I'm questioning.
Everyone should have a hobby. Many hobbies, yours among them, are best pursued in private.
So I'd be very interested in hearing your thoughts on that distinction,
It would appear that many of us think it would be almost as much a waste of time to think about that distinction as conversing with you has proved to be.
If we wanted to waste our time on such things, we'd talk to a chatbot. Whatever we may think of chatbots, they're more thought-provoking than you have been.
and on any counterexamples you think challenge my position.
We'd have to start with an ontological question: Do you actually have a position?