1.The pseudo-scientist considers himself a genius.
2.He regards other researchers as stupid, dishonest or both. By choice or necessity he operates outside the peer review system (hence the le of the original Antioch Review article, "The Hermit Scientist").
3.He believes there is a campaign against his ideas, a campaign compared with the persecution of Galileo or Pasteur.
4.Instead of side-stepping the mainstream, the pseudo-scientist attacks it head-on: The most revered scientist is Einstein so Gardner writes that Einstein is the most likely establishment figure to be attacked.
5.He coins neologisms.
["new words", in this case meant to sound as scientific as possible-RG]