What is the purpose of the little tiny sink on the left?

Emergency back up sink when you fill other one up with dirty crap. Designed to make you panic and hopefully do something about the real sink. I’ve always hated double sink designs. They just use a bunch of extra space that could have been more sink.

No, it’s an insinkerater - it’s got a mechanical spinning/bludgeoning device (sorry for the crude imagery!) that reduces leftovers and carrot stubs and the like to a fine meal so it can go down the drain.

I think it’s better than in the rubbish, was the thinking? Still not as good as compost, admittedly