A special counsel's report describing the president as an “old man with a bad memory” sparked immediate condemnation of Biden…and a political storm. Several neurologists say that forgetting the names of acquaintances or having difficulty remembering dates from the past, especially when under stress, may simply be a normal part of aging.

It's normal for older brains to have more difficulty retaining and then retrieving new information, but mental processes like decision-making and judgment can improve with age, experts say.