| Rating | Solver | Clue |
|---|---|---|
| LOGIC | Sound reasoning | |
| SOPHISTRY | The practice of a sophist; fallacious reasoning; reasoning sound in appearance only. | |
| SENSE | Sound perception and reasoning; correct judgment; good mental capacity; understanding; also, that which is sound, true, or reasonable; rational meaning. | |
| SOUNDNESS | The quality or state of being sound; as, the soundness of timber, of fruit, of the teeth, etc.; the soundness of reasoning or argument; soundness of faith. | |
| SOUND | Founded in truth or right; supported by justice; not to be overthrown on refuted; not fallacious; as, sound argument or reasoning; a sound objection; sound doctrine; sound principles. | |
| ILLOGICAL | Ignorant or negligent of the rules of logic or correct reasoning; as, an illogical disputant; contrary of the rules of logic or sound reasoning; as, an illogical inference. | |