The sibling comment pointed it out; MAMMA is revealed with one yellow A and one grey A, meaning it has told you there's only one A. If the answer was AORTA, then both As in MAMMA would be yellow.
> If the answer was AORTA, then both As in MAMMA would be yellow
Why would the last A be yellow and not green? It's the correct letter in the correct location. MAMMA should be gray, yellow, gray, gray, green.
> If the answer was AORTA, then both As in MAMMA would be yellow
Why would the last A be yellow and not green? It's the correct letter in the correct location. MAMMA should be gray, yellow, gray, gray, green.