Comment by jancsika

Off the top of my head:

* critique of arguments for the existence of God (reasonable or otherwise)

* critiques of national policy of a given political party (reasonable or otherwise)

* reporting on the alleged wrongdoing of a powerful political official

* allegations of infidelity of people considered royalty within a given country

* finding and reporting security bugs in medical devices that use proprietary software

* satire

* propaganda

* thought experiments

* standing in a public square and lying about established facts of science

**

If you can categorize the speech and its not in the category of yelling fire in a crowded theater, I bet it's protected by the 1st Amendment.

Edit: clarification

Edit 2: Since this is HN and you didn't specify 1st Amendment in your question, let me be pedantic and add an empty bullet point for a type of speech that is protected by the 5th amendment:

*

Edit 3: I think my empty string is in the wrong scope. One must invoke the fifth amendment by speaking. So the bullet point should look like this:

* invoking the fifth amendment to say this: (NUL byte goes here)

:)