How can you tell it an argument is sound

What does the word precocious mean in this sentence

Have you ever contributed to “social media outrage” (using your social media accounts to boost the anger about a contemporary issue by forwarding it, liking it, etc.) without stopping to think who might’ve originated the message or what the originator’s motives might’ve been? provide example.

Brainliest asap! 98 points what goes up and down but stays in one place?