Through HM, who has been studied much longer than EP, researchers have learned about different memory abilities. Even though HM couldn't say what he'd had for breakfast or name the current U.S. President, there were some things that he could remember. Scientist found that he was able to learn complicated tasks without even realizing it. In one study, he learned how to recreate a drawing by only seeing the drawing's reflection in a mirror. Each time HM did the task, he claimed never to have tried it before. And yet, each day his brain got better at guiding is hand to work in reverse.