He didn't. By stating that he has now way of verifying he most likely meant that he exhaust all the ways, within his ability, to verify it. While the other poster made no effort to verify if Jacques is not a bot (it's easy). There's a difference in actively verifying given statements and passively accepting all that is written or all doubts that a busy mind can produce.
I think you may have missed it a bit too. jacquesm wrote:
...I have no way of verifying it then I don't believe them. Worked pretty good so far.
This can't possibly be true since one can't verify everything. If one truly lived this then they'd be in an endless quest of verifying things. For instance, verifying verifiers.
We are about to enter into an age of hard to detect AI generated articles and research so this isn't philosophical silliness.