Incorrect. Calculators produce their results by logical relationships hard wired directly into their circuitry. Basically, it's a series of voltage gates that physically play out the AND/OR/NAND/NOR/etc logical processes. There's nothing "random" about it; it's essential a conversion from one data type (binary/boolean) to a more easily readable one (base ten decimal).
I know how computers and bitwise math works, and yet none of that explains where you came up with "2%" or how you didn't fundamentally understand what he was saying.
Yeah, the word random was probably wrong, but I got the feeling he was referring to the more arbitrary process of choosing a method.
I think the way brain cells grow in our brain is much akin to the way branches grow in a tree. You can have two trees for instance which have the same DNA, and are in fact clones. (Cloning plants is relatively easy compared to cloning animals, usually you take a branch and put in water and it grows roots, and that's a clone.) If you have two plants that are the same age and are clones, then each tree grows its branches in different locations, that is a random fractal process, and a similar process is involved in growing brain cells those brain cells determine how we think, that is why I believe a random process is involved in our thinking rather than a procedural process that governs a computer. I'm not saying its entirely random, but our associative memory works that way.