Some research has found that the electrical activity of the brain indicates that lucid dreams may involve a mixture of rem sleep and wakefulness. if this research can be repeated, it may point to the idea that it is possible to be self-aware while one is asleep. this finding highlights the importance of
falsifiability
replicability
extraordinary claims
correlation vs. causation

Replicability

Explanation:

Some studies indicate that the brain's electrical activity suggests that a combination of REM sleep and wakefulness can include lucid dreams. If this work can be replicated, the principle that you can be self-aware while you are sleeping may be pointed out. This result emphasizes the importance of replicability

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link: