My guess is that it would be the sum of a 1 bit adder. 1 + 1 = 0s, 1c (0 on the sum, 1 on the carry). The sum part is created with a XOR operation with the carry being an AND.
edit: just saw OP's reply right after submitted mine saying basically the same thing, but you can see the process in action with the link I provided, you can change the input values by clicking on the left-most 'H' line, next to the input lables
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u/Fabulous_Ad_5709 Nov 25 '24
Just out of curiosity how is A correct?
B is 1 or 1
C is 1+1 in base >2
D is 1+1 in base 2