Thomas Alexander Szlezák also said the justification for Socrates' attitude towards his friend is emotional rather than not philosophically demanding because it is inevitably based on Crito's level of reflection. The crucial point for Socrates is in the "Phaedo" dialogue rather than "Crito". Socrates in "Crito" avoids using the word "soul" – a concept that is introduced and discussed in various dialogues – and dealt with a metaphysically neutral paraphrase, apparently because Crito does not accept the philosophical assumption of an immortal soul.