Prone to confusion.
If you are easy to confuse, you are muddlefuddlable.
James is a very muddlefuddlable human.
Muddlefuddle the common act of muttering and fumbling through a sentence producing nonsense words in succession.
Melanie was upset with Dan and yelled at him in a nonsense dialect. He then accused her outright muddlefuddle of her words.