The different bets James had to account for -
1. That Emma would bet enough keep James out of reach no matter what. Correct, Emma wins, wrong, James wins.
2. That Emma would bet $0-1 on the chance that James was playing not to lose. Correct or false, Emma wins.
What I don't understand - the only way James bet makes sense is if he wasn't confident that he was right.
However, James was batting 97% (33/34) in Finals, and he also seemed pretty confident in his answer. There was a chance that Emma would choose option 2, and I reckon there was a better chance of happening than the 3% chance of James being wrong. Just go all in.