Human beings are physically incapable of sensing “Reality”. Thus we are very much like the Prisoners in Plato’s Cave.
Physicists say we can sense only 4.6% of the Universe as the rest does not reflect any of the electromagnetic spectrum. Of the electromagnetic spectrum we can see, with our eyes alone, only 2.3% on a logarithmic scale of frequency, while on a linear scale it is 0.0035%.
So, regarding vision, of which most of us largely depend on, we can only sense about 0.1o58% of what exists.
Then we take that almost insignificant slice of reality via a complex trip through the optic nerve after which there are five or six synapses to cross prior to getting to any of the areas of the brain that deal with vision.
At each synapse, the data is modified plus or minus 10% before it gets to the various visual centers in the brain. Then within the visual centers there are more synapses and more modification.
At that point, we run what is left through our cultural programming, further altering the original stimulus of visible light that was reflected off some things.
“Recently, a team of anthropologists and psychologists at the Max Planck Institute for Psycholinguistics in Germany and Radboud University in Nijmegen, Netherlands, set out to discover how language and culture affected sensory awareness. Under the leadership of Asifa Majid and Stephen C. Levinson, they made up a kit of systematic stimuli for the traditional five senses: for sight, color chips and geometric forms; for hearing, pitch, amplitude and rhythm variations; for smell, a set of scratch-and-sniff cards; and so forth. They took these kits to over 20 cultural groups around the world. Their results upend some of our basic assumptions.” T. M. Luhrmann , professor of anthropology at Stanford. — The New York Times
“…the way a language cuts up the sensorium can be shown to have significant effects directly on percepts. For this reason language is a crucial interface between I ndividual psychology and the cultural construction of the world around us. Language regiments our communication, and in so doingregiments our thinking.” — Majid & Levinson
So, regarding vision, of which most of us largely depend on, we can only sense 0.1058% of what exists and then we change it into something else.
In other words, we all live in a consensual illusion and believe in “imaginary things”. No one is immune.
Words and concepts help us to agree on what things are, but they are in no way real and at best approximations.
So, regarding another’s judgement of “Reality” they are no expert and only fool themselves if they think they know what is “Real”.