Throughout this week, we have been discussing epistemology, touching on various branches of this topic, focusing often on the progression of opinion, belief, and knowledge. A brief, but somewhat broad definition of the three terms according to our Philosophy textbook and what we used in our discussions: Opinion- Statement that cannot be proven true or false. Belief – Statement that can be proven true or false. Knowledge- Justified true belief. Where a belief becomes knowledge was an area very much debated and broken down further. An idea that caught my mind was the definition of knowledge as society’s beliefs, as a collective belief.
Use Ptolemy’s theory for an example. It was once believed that all celestial bodies within our cosmos orbited around the Earth. Similar to how we now believe that the earth and the planets of our solar system orbit the sun, the people of Ancient Greece accepted the Geocentric model as truth, and more specifically, as knowledge. This theory was not only widely accepted but justified. There were two common observations that supported the idea that the Earth was the center of the Universe. The first observation was that the stars, sun, and planets appear to revolve around the Earth each day. Stars closest to the equator appeared to rise and fall, and circled back to its rising point each day. The second observation was that the Earth did not seem to move from the perspective of the Earth bound observer, remaining solid, stable, and unmoving. In other words, it was completely at rest. If the celestial bodies around the Earth revolved, and the Earth remained still, then the conclusion could be drawn that everything orbited the centered Earth.
Nowadays, however, our newest mathematical and scientific discoveries and theories, such as aberration, parallax, and the Doppler effect, have proven that the Sun is actually the centre of our solar system. We are taught in school and by society that this theory is fact, and is indeed observable out beyond our atmosphere if only our naked eye were able. However, how can we be sure that are current theory is true?
If common knowledge can be defined as beliefs justified by the agreement of society, then knowledge is but the overlapping of personal beliefs (beliefs defined as statements that can be proved true or false). The line in which a belief becomes knowledge is crossed with justification, but it seems justification is a grey shade that is solidified through agreement of the masses. This interlacing of personal perspectives questions whether what we know is true, but nonetheless affirms the world in which we live in today.