correct base and exponent in pow function

[mvaios]

I think you meant to raise the fitness to the power of two and not the opposite. i might be wrong though.

[GypsyDangerous]

I believe that Dan intended it to be 2^fitness because 2^x increases faster than x^2 which means that agents that do good do ALOT better than agents that do bad. am I right @shiffman