空くう論ろん家か

noun

doctrinaire; armchair theorist

Refers to someone who insists on abstract theories without regard for practical realities. Often carries a critical or dismissive tone.

• 彼かれは空くう論ろん家かで、現げん場ばのことは何なにも知しらない。

  He's an armchair theorist who knows nothing about what happens on the ground.