This isn't what I was referring to. It's not storage but retrieval that's broken. I can't work out how to convert miles per hour to minutes per mile, even on p

This isn't what I was referring to. It's not storage but retrieval that's broken. I can't work out how to convert miles per hour to minutes per mile, even on paper. My brain confuses and transposes the operations necessary to do formulas. I have difficulty working out where to put the variables. This can happen with the instructions in front of me. There's a certain kind of logical/calculative abstractness I can't process without a lot of effort. A lot of math (and LISP syntax) seem to require this. Matrix operations and accounting don't. (Discrete math was fun!)