Be quiet

When you don’t know what’s going on, be quiet.

That way there’s a 50% chance people will think you’re a fool.

If you talk, there’s 100% chance people will think you’re a fool.

If you do know what’s going on, be quiet.

That way you can draw out the fools.

Plus, you can disproportionately impress the crowd when you finally reveal your knowledge.

In other words, no matter whether you know what’s going on, or not:

Be quiet.