Many individuals harbor a deep-seated skepticism toward scientific claims that involve entities or events that cannot be directly perceived. The common objection is that invoking the "unobserved" is "completely antagonistic towards the scientific method." However, this perspective fundamentally misunderstands the nature of scientific inquiry. As the speaker highlights, "almost everything of interest that you know about science is about the unobserved." Science is not merely a collection of things we can touch or see with the naked eye; it is a rigorous process of inference, modeling, and interpretation.
To illustrate the gap between observation and reality, the speaker points to the example of dinosaurs. While a visitor to a museum might claim, "I've seen a dinosaur," this is technically inaccurate. What the observer has actually encountered is a "fossil," which is an "ossified bone" that has been "metamorphosed into rock." No human being has ever witnessed a living, breathing dinosaur. Instead, we have discovered physical remnants, and through our scientific frameworks, we "interpret them to be huge reptilian bird-like creatures." When paleontologists "assemble their skeletons," they are essentially constructing a narrative—a story about a creature that "walked the earth tens or hundreds of millions of years ago." This demonstrates that our knowledge of the past is an intellectual reconstruction rather than a direct sensory experience.
Moving beyond biology, the speaker notes that our understanding of the universe is built entirely upon unobservable foundations. For instance, "no one has ever seen the core of the sun and no one will ever observe the core of the sun." Despite this limitation, we possess profound knowledge regarding "stellar fusion." We understand that "hydrogen nuclei being crashed together" creates helium and heat, yet this occurs in a domain inaccessible to direct vision. Similarly, we do not witness the "big bang" nor do we see the "movement of continents" in real-time. These concepts are established through the observation of effects rather than the causes themselves.
Perhaps the most compelling argument is that even when we believe we are observing something, we are often merely observing "instruments detect those things." We rely on technological interfaces to mediate our relationship with the physical world. By "watching the effects through instruments," we develop complex theories about reality—such as the existence of "other universes" or the behavior of subatomic particles where "photons are interacting with the photons that we can see."
In summary, the scientific method is not constrained by the limits of human perception. By insisting that science must only deal with what is directly observable, one would be forced to discard the vast majority of our modern understanding of the cosmos. Science is, in essence, the art of theorizing and validating the existence of the unobserved by analyzing the observable effects they leave behind. True scientific progress requires us to look beyond our immediate senses and trust in the logical frameworks that explain the hidden mechanisms of our universe.