// 真偽値正規化関数
!f = \(b)
 !r = 0
 if(b)
  !r = 1
 r

// 真偽値判定関数
!show = \(b)
 !r = "偽"
 if(b)
  !r = "真"
 r


scale(0.4)
 fs("black")
  font("DejimaMincho")
   text(show(1))