Original statement:
it is rational not to acquire such info unless one expects that the benefits of doing so will outweigh the cost and difficulty of doing so
Two ideas:
rational not acquire info
expects benefits outweigh c&d
Group 3 Rule: negate sufficient
[not] expects benefits outweigh c&d --> rational not acquire info
Contrapositive:
[not] rational not acquire info --> expects benefits outweigh c&d