This question is both complex and simple. The term 'corn' has actually changed meaning over time to refer to different things. It was actually once used to refer to wheat or several other kinds of grain and as far as I'm aware of is actually still used for that purpose in some areas. What we now normally refer to as corn is technically called maize, which is a plant native to the Americas that was later introduced to the rest of the world after the Spanish started to colonize (or rather, subjugate) the 'new world'. Maize is officially classified as a 'cereal' which in this context basically just means that its an edible grain. Although, apparently the edible parts of grain (such as corn kernels) are referred to as caryopsis and are classified as a type of dry fruit. Caryopsis is basically just the technical term for what we normally refer to as grain, which means that corn is for all intents and purposes a form of grain. tl;dr Corn is actually maize which is a type of grain, but grain is technically a form of fruit. Another interesting fact is that vegetables don't exist. To be more precise, 'vegetable' is strictly a culinary term that's not actually used in botany. Things that we refer to as vegetables are actually fruit, roots, stems, leaves or even flowers.
As far as I'm concerned, it depends on how you use it. If you make corn into flour, it's a grain, if you just cook it and eat it as is, it's a vegetable.
So you mean to tell me corns isn't the junk that my feet start turning into when I keep wearing worn-out socks long past their due? I think we should as the corn what it thinks it is. Here we all are debating while not asking the real authority on corn's authority! Time to give a call to mizz maize for a firsthand statement. I'll get back to you when she finishes describing the situation to me.
Corn is an anomaly that the SCP Foundation was not able to contain, so they released an amnestic to the general public to make us think that we’ve always had corn. I don’t trust it.
Corn seems to fall into multiple categories, leading me to believe that it is secretly an otherworldly entity sent to Earth in order to confuse us about what vegetables truly are. I shall dub this new type of edible “cornbulite.”
Dang, I thought I clicked on Wikipedia for a second. Good to know! And I'm a potato expert not a corn expert, so I have nothing to add. Corn is yes.
I may or may not have looked up Wikipedia to get some of that information, though a lot of it I already knew off-hand.