False statements of fact

US constitutional law on false assertions

In United States constitutional law, false statements of fact are assertions, which are ostensibly facts, that are false. Such statements are not always protected by the First Amendment. Often, this is due to laws against defamation, that is making statements that harm the reputation of another. In those cases, freedom of speech comes into conflict with the right to privacy. Because it is almost impossible for someone to be absolutely sure that what they say is true, a party who makes a false claim isn't always liable. Whether such speech is protected depends on the situation. The standards of such protection have evolved over time from a body of Supreme Court rulings.

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