What does being able to roll your tongue mean?

Being able to roll your tongue is a trait, meaning it's a characteristic that's passed down through genes. It's not a sign of anything special or a reflection of intelligence.

Here's a breakdown:

* Genetics: The ability to roll your tongue is determined by a dominant gene. If you inherit this gene from either parent, you'll likely be able to roll your tongue.

* Not a skill: It's not something you learn or train for. It's simply a physical capability.

* Not related to intelligence: There's no connection between tongue rolling and cognitive ability.

* Not universal: Around 70-80% of people can roll their tongue, while the remaining 20-30% can't.

So, what does it mean to be able to roll your tongue? It simply means you inherited a particular gene that gives you the physical ability to do so.