What is the correct English word which describes these sentences below?

Question

-All thumbs are fingers but not all fingers are thumbs.

-All vacuums are hoovers but not all hoovers are vacuums

-All hot tubs are jacuzzis but not all jacuzzis are hot tubs

--What is the actual definition and term used for sentences similarly to these?--

Answer 1

They're also reminiscent of (though not quite) syllogisms.

Answer 2

They are all called coordinate sentences because they use the coordinate conjunction but in the middle of the sentences.