Liar (WaPo's Version)

Following up on an earlier item, the Washington Post has a story today about untruths becoming facts before they're undone. Money quote:

As the presidential campaign moves into a final, heated stretch, untrue accusations and rumors have started to swirl at a pace so quick that they become regarded as fact before they can be disproved.

Again, once a claim has been established as true, twice as much work has to be done to undo it.