An amazing watch bet that you are guaranteed to win every time

One thing in advance: for better readability, when Roman numerals are used on a clock face, the 4, or actually the Roman "IV", is written as "IIII". This is always the case when the clock face has Roman numerals, whether it is a tower clock, wristwatch or alarm clock. You can rely on this 100%.

Start the bet with an offer to the "victim", offer him a riddle that he probably won't be able to solve

When the "victim gets in," you begin with the introduction "imagine the face of a church clock: huge dial, white, 2 hands."

Then you proceed in the sense of: "I'll quickly write down the 12 digits here" and write 12 Roman numerals one below the other on a piece of paper, with the "4" as "IIII"

Every educated person will soon complain: "the '4' is misspelled"

First, deny it simply by saying "no, the "4" is spelled correctly" and then more and more vehemently, because your "victim" will - from his point of view, quite rightly - not deviate from his opinion and insist that the Roman numeral 4 is spelled "IV".

If your "victim" gives in with something like "it doesn't matter how the 4 is written...", you have to vehemently and insultedly follow up with something like "no, it does matter, I'm not going to let you make me look like an idiot or dyslexic."

Now you offer the bet with full conviction, either for a dare, something fun, a round of drinks, or even money (I have earned over a thousand euros with this bet over the last 30 years):

"I bet you... that the 4 is spelled "IIII" in Roman numerals!"

Your sacrifice is guaranteed to hit

Now you can solve and explain that the Roman numeral 4 on clock faces is always written "IIII" and that you introduced the puzzle with the task "imagine the face of a tower clock"

Your "victim" will immediately check this, google it and with absolute certainty will not find a Roman clock face anywhere on which the 4 is represented and written in any other way than "IIII"