ProofAssist.first_safe_some: law of minebender-game@1.0.0.0
Import: import minebender-game@1.0.0.0/proof_assist.bend as ProofAssist
Lines 68-74 of minebender-game@1.0.0.0/proof_assist.bend: https://jend.leeeet.dev/read.txt?path=minebender-game@1.0.0.0/proof_assist.bend&start_line=68&end_line=74

import Base
import minebender-game@1.0.0.0/types.bend as T
import minebender-game@1.0.0.0/game.bend as G

# While some safe cell is unrevealed, first_safe finds one.
law first_safe_some:
  for +layout: T.Grid(Bool)
  for +shown: T.Grid(Bool)
  for +ps: List<&2, T.Pos>
  for e: {G.all_safe.go(layout, shown, ps) == False{} : Bool}
  SafeAt(layout, shown, ps)

Uses (13):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.and
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.not
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Empty.absurd
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=minebender-game@1.0.0.0/board.bend&name=at
  https://jend.leeeet.dev/definition.txt?path=minebender-game@1.0.0.0/board.bend&name=mine
  https://jend.leeeet.dev/definition.txt?path=minebender-game@1.0.0.0/game.bend&name=all_safe.go
  https://jend.leeeet.dev/definition.txt?path=minebender-game@1.0.0.0/proof_assist.bend&name=SafeAt
  https://jend.leeeet.dev/definition.txt?path=minebender-game@1.0.0.0/proof_assist.bend&name=first_safe.go2
  https://jend.leeeet.dev/definition.txt?path=minebender-game@1.0.0.0/proof_base.bend&name=true_ne_false
  https://jend.leeeet.dev/definition.txt?path=minebender-game@1.0.0.0/types.bend&name=Grid
  https://jend.leeeet.dev/definition.txt?path=minebender-game@1.0.0.0/types.bend&name=Pos