[Stultis] Yes, of course.
[Goldhammer] If no arguments or observations logically entail any scientific proposition
[Stultis] Yes
Don't you realize that you are contradicting yourself?
No I'm not. You just ignored the rest of the sentence (following my last "yes") and indeed the rest of the message, where I pointed out that facts/observations do not entail theories, but rather theories entail facts/observations. If I were confused or inconsistent about the direction of entailment, I would be contracting myself. If I argued that facts entail theories, but can also be used to test the theories they entail, I would be contradicting myself.
You need to REread Popper.