"He has selective memory loss, never hearing what he doesn't want to and malapropism-itis, which result in his confusing anyone he happens to be talking to and even confusing himself. However, he more often than not blames the people he is talking to for causing the confusion in the first place. On the few occasions he does realise that he is in the wrong, he tries to lie out of his predicament, often unsuccessfully.
A typical conversation will involve his confusing both himself and others, while becoming drastically sidetracked from the matter in hand. He is usually oblivious to the chaos he causes, often blaming his interlocutors for any confusion. On the rare occasions he realises he is at fault, he often attempts to divert the blame by lying. Inevitably becoming confused by his own lies, his last resort is usually to claim he was recording a stunt for a hidden camera show".
Dennis or Count Arthur Strong? You decide.