Experts Zenzi Griffin, Ben Michaelis, James Pennebaker and Andrew Budson shared their opinions about Donald's verbal complexity as the public grew more concerned about his possible cognitive decline.

In an interview with Stat, all four specialists reviewed Donald's recent speeches and commented on their differences from those he gave years ago.

"Everyone to some degree has some level of mixing up of names," said Ben, referring to the times Donald confused people when he spoke about them in his speeches. "It's a bit of a red herring."

"That level of similarity really makes it an easy error to make," Zenzi, a psychology professor at the University of Texas at Austin, agreed.

Ben added there was "reasonable evidence suggestive of forms of dementia," and he noted that Donald's inability to deliver complex sentences and vocabulary could lead to "a certain picture of cognitive diminishment."

He continued, "Tangentiality certainly amped up and it's difficult to follow him. You'd expect some cognitive diminishment of course, he's 78 years old -- if he was your grandfather you wouldn't expect anything different. He just happens to be running for president."

According to Ben, Donald's use of words in an incorrect order might also be a sign of cognitive issues, which could be caused by his age or illnesses.

Meanwhile, Andrew stated that potential issues on The Apprentice star's front lobe could affect his planning and problem-solving functions, adding, "Such a habit could also reflect ADHD or poor sleep, though it can also be a sign of impending Alzheimer's. There are absolutely changes that are occurring, without any doubt. Now, it's much more about evoking different things, using general terms and saying the same thing again and again, then jumping to something else, then jumping back to it."