Edison format ruling
Solemn Judgment
Card text as printed in this era① If a monster(s) would be Summoned,
OR if a Spell/Trap Card is activated: Pay half your LP;
negate the Summon/Activation, and if you do, destroy it.
Rulings
This effect can't negate monster effects that start a chain, even if that effect would special summon a monster.
For example, it cannot negate Gorz, The Emissary of Darkness' effect.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Edison forum — sourced change requests get reviewed.