I hope this question isn't off-topic: I'm just curious. In logic, we commonly use $\wedge$ and $\vee$ to represent conjunction and disjunction respectively. I often find myself confused about why we chose these particular symbols. On some level, perhaps I should be satisfied with the answer "Choice of symbols is arbitrary; we could have chosen any symbols, but we chose these." But there are reasons why I think this particular choice wasn't completely arbitrary.
First of all, we also use $\wedge$ and $\vee$ to represent the meet and join operators. That's, of course, no accident: The set of equivalence classes (defined by mutual entailment) of first-order sentences forms a Boolean algebra. So, I'm guessing the use of these symbols developed simultaneously within logic and algebra as the connections between algebra and logic were being discovered. That would be a satisfactory explanation, but I still find myself puzzled.
In the Boolean algebra described above, $\top$ ("top") is the equivalence class of first-order sentences that contains all tautologies and, likewise, $\perp$ ("bottom") is the equivalence class of first-order sentences that contains all contradictions. The meet operator ($\wedge$) is rather suggestive: it seems to visually invite one to map two points in the lattice to some point which is located above it. And similarly, the appearance of $\vee$ seems to invite us to map points to a point lower in the lattice. But of course, if "top" is at the top and "bottom" is at the bottom of the lattice, this is not what we do.
I suppose we can solve this problem if we just draw our lattices with $\top$ at the bottom and $\perp$ at the top. But it just seems to me that the combination of symbols and words used to describe them creates a confusing mess. Perhaps someone with knowledge of the history can explain how we came to be here.