Based on the information provided within the question it can be said that in this scenario Carter seems to be exhibiting a term known as derailment. In the context of psychology this term refers to a thought disorder where the individual combines sequences of unrelated ideas together when speaking, usually changing from one idea to the next. Which is exactly what Carter seems to be doing.
Derailment is a thought disorder. It is usually observed in patients suffering from schizophrenia. Derailment is characterized by continued disruptions in thought process and jumping from one conclusion to another unrelated or indirectly related conclusion. It is usually observed in the speech of the person but it can also occur in writing too.
So, in this case Carter is exhibiting signs of derailment.
