I found this strange thing upon my textbook
as an exercise to "comment by its truth table".
so I did the gargantuan truth table
But there's nothing to "comment", as I see.
The s2 = y0 reacts as a XOR or XNOR gate depending on x2, the c3 = y2 as an AND gate and the s3 = y1 seems entirely out of place.
Am Ι shortsighted at this?
Is there a connection in this design?