[jcampbell1]

Pie and slice are units of measurement for the concept pizza. Much like you don’t order “two pastas” saying “two pizzas” sounds stupid to people in the parts of US famous for pizza. Bread works the same way, it comes in loaves and slices. You don’t buy “two breads” without sounding stupid.

[pessimizer]

> saying “two pizzas” sounds stupid to people in the parts of US famous for pizza.

This definitely isn't true. Pizza pies are what they are, but it's fine to call it a pie (in obvious context), and most people call them pizzas. You wouldn't dare accuse My Very Educated Mother of being stupid for Just Serving Us Nine Pizzas.

And I'm a Chicago pizza guy, where pizza looks like a pie.

[mansoon]

https://www.youtube.com/watch?v=jCgYMFtxUUw

Sir, you are in violation of the ontology. Chicago pizza, while erroneously linguistically linked to the categorical foodstuff, is not, in fact, pizza.

[moloch-hai]

The correct conclusion is that Chicago is not among the cited "parts".