I know that at first this sounds like a stupid question but I'm not sure about its meaning.
Transitivity states that whenever $(a,b) \in R$ and $(b,c) \in R$, then $(a,c) \in R$, where R is the relation.
Take for example the elements $a=1, b=2$. Now, $1$ is in relation to $2$, so to test for transitivity I'd need a pair $(2,c) \in R$. However, I don't have any pair that satisfies that condition so I'm not sure how to proceed from here. If I had a pair $(2,c)$, I could easily check whether transitivity holds for $1$ if simply $1Rc$. However, since I can't do that, I'm not sure if this relation is transitive or not.