Is This Old Dweeb Even Trying?

Hey, I know what it is to have trouble with short term memory. The other day I fed my cats, got distracted and did it wrong. We have their dry food in a plastic container. But I somehow put the plastic container itself where their food goes and the food wasn't there for them to eat. I quickly caught the error before the cats starved, thank goodness.

But even I wouldn't forget having used the word "timetable" just the day before if I happened to be a candidate for President of the United States and that was a particularly big issue, as it is this year. I want to be gracious and not call McCain a liar (at this minute anyway). So what is the problem? Just confused? Or something worse? An old man with no memory?