premise: Slang 's space cadet `an eccentric , especially one who is stuporous or out of touch with reality ' evolved from Tom Corbett , Space Cadet , a 1950 television series depicting the adventures of a 24th-century cadet in the Solar Guides , the interplanetary police force keeping order in the Solar Alliance .
hypothesis: Space Cadet aired in the year 2000 , and it depicted the adventures of a 21st century policeman and false is not true .