“brownie”?
I would say "brownies" exist objectively. The concept "brownie" may exist to one person, while it may not to another. A child who has been living in a remote village in a remote land in a remote part of the world would not have heard of a "brownie". However, your average American citizen would probably have heard of a "brownie". What is a brownie? A feeling, an object, a definition? Anything you imagine.
Brownies are tangible on a metaphysical scale, so everybody experiences a "brownie" differently. A brownie is an un-quantifiable non-physical yet tangible object.
By including a quantity in your prompt, you generalize and classify the concept of "brownie", which is incredibly rude to those whose ideals do not align with yours.
You should be ashamed.
p.s. not rlly I love brownies so much I want one right now but I cant because I'm in class