“Who will be the arbiter of truths and untruths?”
Um, facts.
The world is not some mysterious place where anything can be true for anyone. Things are true based on facts or they are false based on facts.
Having said that, I have no issue with free speech. There are limits however and speech that can lead to harm for citizens shouldn’t be allowed to propagate without consequences.
If I say something that harms your business and I it as fact and you actually suffer damage. Should I be able to continue to affect your life with falsehoods? I mean, it’s just speech and I should be able to say what I please, right?
Right, except what we view as "facts" regularly changes. For example, it was viewed as fact earlier this year that the lab leak origin story had no merit and was only propagated due race-based fear mongering. Now it is widely seen, regardless of political affiliation, as the most likely source of COVID.
Let's flip the political orientation for another example: it was once fact, not only by the US government but also most western nations and the UN, that Saddam Hussein had access to weapons of mass destruction, likely chemical in nature, and was planning to use them to exterminate the Kurds. We know now this was a lie used to justify military intervention.
A third one: a few weeks ago it was a fact that a US drone strike killed two Taliban targets who we knew were attempting a suicide bombing in the Kabul airport. It was also a confirmed fact that the secondary explosion from that drone strike was definitely, no questions asked, caused by the explosives the terrorists had. Then we find out it was a bunch of kids and there were no terrorists. They lied about the whole thing.
There are some fields, especially politics, where facts are difficult to come by. Instead you have "truth," which is often a distortion of facts to fit narratives.
As far as your comments about limiting speech, that's incredibly naive. We should only limit speech in regards to targeted calls for violence. Anything else, including so-called hate speech, is incredibly arbitrary. Who determines what that is? You certainly don't want Congress or the president to. How do I know that? Because you probably hate who has that majority if they aren't on your team.
Also, go look at Yelp reviews if you want to see examples of people lying about businesses. I guarantee you a good chunk of those are Karens that making crap up because some high school kid forgot to not put pickles on their mcdouble. People lie and exaggerate. It happens. Businesses deal with it. Karen should be allowed to make a fool of herself, not baby-sat by laws that restrict everyone else's rights.