The NYT reports on its 10-minute interview with Biden and tells us that “Mr. Biden said that he had orally granted all the pardons and commutations issued at the end of his term, calling President Trump and other Republicans ‘liars’ for claiming his aides had used an autopen to do so without his authorization.”

So he’s using the word “liars” without knowing if people are lying. It makes me want to just call him a liar and be done with it. If the aides were using the autopen somewhere outside of his presence, how would he necessarily know what they were doing? He’s saying trust me — trust me or else I’ll call you a liar.
The article continues: “‘I made every decision,’ Mr. Biden said in a phone interview on Thursday, asserting that he had his staff use an autopen replicating his signature on the clemency warrants because ‘we’re talking about a whole lot of people.'”

How does he know he made every decision? We’re not liars if we simply doubt that he had the mental capacity to know what was going on. What sort of decision-making was it? Am I a liar if I presume he did nothing more than rubber-stamp whatever was recommended by the staff? In that light, the autopen is irrelevant. It was “a whole lot of people” who were given clemency, and that’s a reason to spare him the effort of wielding the pen, but it’s also a reason to wonder if he knew much or anything about what he was doing.

At least we can say that he takes ownership now of the decisions that were made. And yet the reasons to take ownership after the fact are completely different from the reasons to make the decision in the first place.
By the way, Biden did hand-sign his full and unconditional pardon of his son Hunter. Note the tragic struggle over the inscription of the capital B: