um... they th- you know what- heres google- What language do deaf people think in? answer: sign language
If a person was born Deaf and is primarily using sign language as their way to communicate, it's very likely that this person will also think in sign language. Interestingly, a person who is Deaf but also learned to speak through vocal training will sometimes not only think in sign language but also in spoken language.
I think he has car insurance because as you know, theres planes too so um. I doubt they get car insurance because they arent cars.... so..... ¯\_(ツ)_/¯
