The superstition of a four-leaf clover’s luck is ambiguous. While getting a four-leaf clover may grant a luckier experience, you must first be lucky in order to acquire the clover. There are two ways this could be interpreted. 

 The first way is thinking of luck as a constant value. Therefore, you must first have enough luck to find your four-leaf clover before the clover can grant you more luck, then allowing you to find even more four-leaf clovers, potentially exponentially increasing your luck until you may one day find a clover-bed full of nothing but four-leaf clovers. 

The second way is thinking of luck as a variable that is determined before a potentially lucky situation. In this case, you would not need to be generally lucky to find a four-leaf clover, and you would simply need to get lucky that one time. Then, getting the four leaf clover would not guarantee that your luck is higher, it will only increase your chance of getting luckier. 

However, the only truthful way to think of luck is as a human construct. Nothing is truly ‘lucky’, and it is all predetermined by science or otherwise, even digital ‘luck’. By this, truthful, definition, the four leaf clover does nothing but increase your confidence, then increasing your ability to think you’re luckier. That’s right, it's a placebo. A four leaf clover is no symbol of luck, but instead a symbol of how easily even non-sentient life can manipulate man without even trying.