For 835 days starting with his inauguration on Jan. 20, 2017, the Star kept track of every false claim Donald Trump made as U.S. president. Why? Historians say there has never been such a constant liar in the Oval Office. We think dishonesty should be challenged. We think inaccurate information should be corrected. And we think the sheer frequency of Trump’s inaccuracy is a central story of his presidency.

If Trump is a serial liar, why call this a list of “false claims,” not lies? You can read our detailed explanation here. The short answer is that we can’t be sure that each and every one was intentional. In some cases, he may have been confused or ignorant. What we know, objectively, is that he was not telling the truth.

Daniel Dale continues to fact check for CNN. The Star is maintaining this page as an archive.