It means we cannot be justified in knowing anything, and are isolated from any objective reality. The basic rules of probability from which we assume the reliability of memory, senses etc are taken on religious style faith.
I've been trying to find a way around this, but you are probably right.
I mean I am checking and and again just in case because I don't like the idea that scepticism is right.
I'm not familiar with that notion.
It means we cannot be justified in knowing anything
Justification depends on a function that tells you whether something is justified. I can easily justify a belief with the fact that a teacher taught it to me.
In what sense do you think it can not be justified and why do you think that framework of justification has some sort of reality to it?
I've raised arguments for philosophical scepticism before, which have mostly been argued against in a Popper-esque manner of arguing that even if we don't know anything with certainty, we can have legitimate knowledge on probabilities.
The problem with this, however, is how you answer a sceptic about the notion of probability having a correlation with reality. Probability depends upon axioms of probability- how are said axioms to be justified? It can't be by definition, or it has no correlation to reality.