Misunderstandings and lack of information about aphasia can cause people to draw conclusions about cognitive ability, such as in the situation with Joe Biden, who has a history of stuttering.

Aphasia occurs when a brain disorder affects a person’s language abilities, such as speaking, reading, and writing. The type of aphasia a person has depends on where damage occurs in the brain.

Developmental language disorder (DLD) is characterised by receptive or expressive language difficulties or both. Children with the neurodevelopmental condition "struggle to comprehend and use their ...