One of these days...

Just as the almost-perfect sign at Nishitetsu train station urges ("please push the red button in case someone falls into the track area" instead of "please push the red button if someone falls into the track area"), the following sign at Yanagawa station is begging for its bluff to be called. Seeing this before me last week, I fancied a tasty danish within that was priced at 120 yen. "Insert an exact amount of money". What about if I put in 100 yen? That's a more exact amount than 120 yen. Would the station master have let me had my danish if I had persisted with my line of reasoning? Probably, but it would have taken hours of deliberations and time wasteage, and forms signed in triplicate...