Maeght,
Examples?
Oh the optimism you dear sweet boy you.
Here's how it works:
Step 1: Vladdo makes up his own personal meaning for the term "scientism". It's hard to tell what it is at any given time because it moves around a bit, but essentially it's something like "thinking science has or will have the answers to everything" rather than its correct meaning of, "giving undue weight to the methods and findings of science".
Step 2: He then accuses others of subscribing to his personal version of the term, even though those people have never said any such thing.
Step 3: Then he hits those people with, "how can you know that though?", "that's self-validating" or other such stupidities.
It's deeply dishonest (which is why he won't be able to provide any examples) but that's his schtick nonetheless.