I was going to pick "biology", since anatomy/physiology is one of my strongest special interests, but I ended up picking "languages." Even though I've always been very skilled in the health sciences, there are some topics that are difficult to grasp at first. But I don't even have to try with learning languages. I self-taught myself advanced Spanish, I took French and Spanish simultaneously, and language courses are probably the only ones where I literally don't have to study whatsoever.
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Helinger: Now, what do you see, John?
Nash: Recognition...
Helinger: Well, try seeing accomplishment!
Nash: Is there a difference?