False Lucidity is a term that gets floated around DV from time to time, referring to dreams where the dreamer is not sure if they were truly lucid or not. There is no such thing as a false lucid dream. This is not a term used by any dream researcher, and it often used by dreamers to express frustration at a dream which did not live up to their particular expectations of a lucid dream. To clarify:
You do not have to intentionally induce a lucid dream for it to be lucid. Many lucid dreams are completely spontaneous.
You do not have to be lucid throughout the entire dream for it to be a lucid dream.
You do not have to have ANY control over the dream whatsoever for it to be a lucid dream.
You do not have to be able to think as clearly as you would in your waking life for it to be a lucid dream.
Taken from http://www.dreamviews.com/f20/what-lucid-dream-93983/

As mentioned before, this thread pops up from time to time and ends in disaster. And on that note. Thread locked.