It appears that what I said was untrue, but I did not knowingly lie to you.
看来我说错了, 但是我并非故意向你撒谎.
What I said was untrue but he fell for it/swallowed it(ie believed it) hook, line and sinker.
我所说的并非实话, 他却完全信以为真.
He exclaimed that it was untrue.
他大声说那不是事实.