"The concept of lucid dreaming remains controversial, and alternative explanations have been given for the phenomenon. It may be that lucid dreamers are not actually sleeping but may be in a daydream-like state of semi-wakefulness. Or perhaps they are just dreaming but have a memory of the dream and believe that they were conscious and directing the dream but were not. It could be a “sleep state dissociation,” in which the person is both awake and asleep in the dream state at the same time. It is even possible that people are being fraudulent and not reporting true experiences. Research is complicated by the similarity between the EEG pattern of REM sleep and wakefulness. A distinguishing feature of REM sleep is that paralysis occurs during it. This paralysis does not typically occur in wakefulness and is the reason that the eye-movement technique was needed by LaBerge’s research participants."

What do you make of this?
I myself have been skeptical of whether my dreams are lucid or not.