Minesweeper isn't a game, it's a religion.

There is only guessing in the most extreme of uncertain situations. Everything else can be deduced by simple random clicking (to start), simple 1-to-1 relationships with blocks, and then the complex multi-variable block forcasting. It's tough to explain, but if you have more than one unknown, you can hypothesize the outcome of the situation based on where the other unknowns MAY be.

Sure, it's totally linear and simple, but it will twist your brain for a little if you realize that pure guesswork only happens only 5% of the time outside of the first 10 seconds of a game. Pure guess work is really pretty rare.