> “They are effective, but doctors need them more, so please don’t hoard” is different from “they are not effective”, hence is a lie.
No, that doesn't follow. Do you have any evidence the CDC knew this was false, and was consistently messaging to the contrary (aka not a pointer to things like 280-char tweets where everyone understands bandwidth would be limited)?
A lie requires intent to deceive, i.e. dishonesty. Not something where they're forced to summarize and strip out details, but provide the details elsewhere when they have the chance. And certainly not a genuine, honest mistake. I have yet to see evidence the CDC knew that masks are effective and yet lied about it. And nobody here has been willing to provide any evidence of that either. Just because they might have been inaccurate in their assessment of the situation, doesn't mean they were lying. Just like how, just because you say "we ran out of ketchup, can you buy some from the store?" and then discover you had some in the back of your fridge, that doesn't mean you're lying.
And btw, I don't even know what example you're talking about. If you're talking about my example like I said, at 1:32, the reporter clearly communicates "surgical masks are not that effective". And it wasn't the CDC talking either. You should really link whatever you're talking about because it doesn't seem to be this example.