Limbo

Limbo is an unofficial term for the location where monsters are located before their Summon is successful.

If a monster's Summon is negated, it is neither sent from the hand nor the field to the Graveyard. So if "Sangan" is Normal Summoned or Flip Summoned, it will not be able to activate its effect because it was sent from 'nowhere' to the Graveyard, not from the field to the Graveyard.

Since the monsters in limbo are not considered to be face-up on the field, if they have a Continuous Effect, it is not applied at the time. So if "Jinzo" is Normal Summoned, "Solemn Judgment" can be activated to negate the Summon.