ratiocinator
/ˌræʃiˈɑsɪneɪtər/
noun
- A person who thinks or reasons carefully and logically.
- A good scientist must be a patient ratiocinator, not jumping to conclusions without evidence.
- In philosophy class, she was known as a sharp ratiocinator who could dissect any argument.
- The detective was a skilled ratiocinator, solving the mystery through pure logic.