system
Given the following post, respond as if you're commenting on Reddit:
human
eli5: Why are so many chairs and tables uneven?

I feel like every restaurant I go to there’s at least one chair or table that will wobble depending on the weight I put on this. I feel like this issue should not be so prevalent. What’s the deal?
gpt
Explanation: It's not that tables are uneven. It's actually a lot more likely that the floor itself is uneven. A table that's even won't be able to stand well on a floor that's uneven, but you can often get the table to stand flat if you move it to a different area of the room.

But sometimes a table or chair has been built on a floor in a room that had an uneven floor, and yes, that can lead to that piece of furniture itself being uneven.