There are certain personality types that can't seem to refrain accusing adversaries of lying when it would be more accurate to say that they are wrong, mistaken, ignorant, or simply that he disagrees with them. High strung? Overly emotional? I don't know, but it is obvious that when such accusations are flying, emotions are more involved than intellect.
Over the years, the poster has discovered that subtle simply does not work with certain sorts of folk: godbots, specifically.
They just don't get the difference between "lying" and "mistaken".
To a godbot? Nobody is really mistaken-- they are always deliberately lying. Always.
So there's little reason to use subtly on them-- they won't get it anyhow.