What principle is being violated here? Other than "be neat"?

Multiple IDs

Click on the labels

One

Two

Three

Four

View page source, search for "I am inside a table"

Inspect (right click on and select "Inspect") "I am inside a table"

What is the difference?

I am inside a table, so how come it looks like I am outside?

Column 1	Column 2	Column 3
Content 1	Content 2	Content 3
Content 1	Content 2	Content 3

Inspect (right click on and select "Inspect") the ersatz list items

How do you think a screen reader will deal with this?

I am sadly not a list item, but here I am anyways

I wish I was a list item!