Yes reddit might have logs, in fact it's incredibly likely that they have detailed logs about their users. however, it isn't an intrinsic aspect of a website to have logs.

I am not claiming that they don't have logs, I am simply refuting what you said, which is that everything on internet can be proven, which is an objectively false statement.

A windows or apple computer are not prerequisites to use the internet and there are no logging requisites for computers at all.

Again, logging is an active task, something being 'on the internet' does not mean that logging is happening implicitly.