A.I. is proving that 20<40 by:

• creating a sequence
• then completely disregarding that
• then saying that since you can add 20 to itself to create 40 it must be less
• then disregarding that and saying that the sequence of numbers proves it because we found 20 first

Honestly since it's such a simple equation, in real life you could just say 20<40 because 20<40. You don't really need to prove anything, the proof is in the logical operator. The homework question is dumb because it isn't clear what they're asking for.