I'm sure someone has brought this stuff up before, but thought I may ask specifically. Which techs does the AI often miss that I can keep in mind for trading? We should all know by now that Alphabet is one of them. I've noticed many miss Iron Working at the start. Liberalism takes some ages too but I never seem to get it first. They miss Medicine a lot. Can someone fill in the blanks the ones they miss? This way maybe I can actually trade better than just using the techs I lightbulb ahead. I've also noticed they overvalue optics and won't trade it cheaply. Discuss.