I take your point about disproof -- my logic was faulty -- and I can't think of an example where the law compels someone to lie. Google hasn't found me any, eit

I take your point about disproof -- my logic was faulty -- and I can't think of an example where the law compels someone to lie. Google hasn't found me any, either. I also checked canarywatch.org and noticed that Adobe have a warrant canary and, yes, I'd like to believe that Adobe's lawyers know what they're doing. And after giving this some thought, I think you've persuaded me, but with one important caveat: it's different in Britain. American warrant canaries might work, but British ones are bullshit. It's all about freedom of speech. As far as I can tell, all the legal theories about compelled speech come down to this: freedom of speech implies freedom from compelled speech. But in the UK there is no constitutional guarantee of freedom of speech so, while I'm not aware of any law compelling people to lie, neither am I aware of there being anything to prevent such a law from existing. Thanks for the interesting discussion. I've learned something today. :)