I will say that when I'm having a genuine lucid dream, after I wake up, I know without a doubt it was a lucid dream. With regular dreams, I look back on them and don't exactly identify with my "dream self." That guy didn't realize how absurd the scenario was. He resembles me, but he wasn't me.
With a genuine lucid dream, I look back at the dreamer and can say, "yeah that was 100% me." Also, I find that becoming lucid always sort of pulls the dream into a more realistic scenario. It goes from chaotic and weird to just plain normal life (only, the rules have changed now).
So I guess what leads me to believe that I've had these "pseudo lucid dreams" is that I look back on them after waking and don't identify with the dreamer the same way I do with a genuine lucid dream. It feels more like I was watching someone else, like a recording, than as though it was a real firsthand experience