 speaking on stage or speaking in public. I'm certainly sure my elderly parents couldn't do that, even though they're both absolutely cognitively intact. So I think the question is not whether or not the president is older at 81 than he was at 77 or showing signs of age. I think any observer without a medical background can say, sure, he looks older. I will add that past presidents, Barack Obama and Abraham Lincoln, aged substantially while they were young. Really hard job for anyone.