Yukti #29

Saturday 7 November 2026 · Sound or fallacy · Tough

Kind of thinking: Argument

Yukti #29 is a Tough sound-or-fallacy puzzle, the puzzle for Saturday 7 November 2026. Yukti, a daily logic puzzle at playyukti.com, gives everyone the same puzzle each day. Here is the puzzle; its route appears here once the free week is over.

The puzzle

Which arguments hold?

Take what you're told as true, even where it sounds odd. Mark each argument Holds, or say what breaks it. Every mark must be certain.

  1. 1Wherever there is mist, there is smoke.
  2. 2Wherever there is frost, there is moss.
  3. 3Wherever there is fire, there is no smoke.
  4. 4Wherever there is moss, there is no fire.
  5. 5The lake has frost, and no smoke.
  6. 6The valley has moss, and no fire.
  7. 7The courtyard has frost and smoke.
  8. 8The hill has rain and fire.
  9. 9The harbour has frost and rain.

In the free week (the past 7 days)

Free to play until Sat 14 November. The route appears here the same day, once nobody can still be playing it.

Play this puzzle