@TwinPeaksQuotes The beauty of this exchange is that eventually Cooper doubts even this testimony. It hinges on...
SPOILERS
Leland/BOB isn't schizophrenic. They are two separate people who are the same man. And one of them isn't real. AND these 3 contradictions are made possible thanks to "dream time". Lynch refused to comment on this point on purpose. It might lead fans to solve who killed Laura, and Lynch said he never wants the mystery to be solved. https://www.indiewire.com/news/general-news/david-lynch-didnt-want-twin-peaks-murder-solved-1234972633/