Can you explain a little bit about Occum's Razor
@Heisenberg?
It basically means the simplest data in a set of data must be the truth right???? But isn't it our primal brain that tries to oversimplify the data? When should I employ Occum's Razor and how can I recognize the difference between Occum's Razor and oversimplification?
Philosophical razors are tools meant to help us "shave off" unlikely explanations for a phenomenon. That doesn't mean we decide those explanations are wrong, but that other explanations are more worthy of our attention. If we investigate the most likely explanations and they do not pan out, we may return to some of the ones we discarded earlier. So razors can help guide our investigations, but they are not tests allowing us to draw conclusions.
Occam's razor is meant to help us when we have to choose between two or more explanations which equally explain the data. It reminds us to apply the scientific principle of parsimony. The word "simplest" gets us into trouble. Many people interpret this to be about complexity. But in many cases, Occam's razor will actually favor an explanation which is more complex.
So lets consider these two explanations for ghost sightings.
1) Ghost sightings can be explained by a combination of psychology, misperceptions, mistakes, hallucinations, fever dreams, drug use, cultural expectations, and hoaxes combined with malleable memory and confabulation.
2) Ghosts are real.
On the surface, the second explanation seems the simplest. However, proper application of Occam's razor tells us the first is most likely. That's because parsimony is not about complexity, it's about assumptions. It's about the number of times we go beyond the evidence and how far we leap when we do. The first explanation cites things that are all well researched, well documented and well understood. It is not introducing any new knowledge about the world. The second explanation asks us to make a number of giant leaps beyond our knowledge. We must assume there is an afterlife, that people can cross over from that afterlife into our reality, and that we are able to notice when they do. We do not have evidence for any of these things.
The proper expression of Occam's razor is:
the explanation which introduces the fewest assumptions is most likely to be correct. Each assumption presents a possible point of error, so obviously the fewer the better.
But, of course, Occam's razor sometimes fails. When trying to make a medical diagnosis doctors usually favor the explanation where one disease accounts for all the symptoms. But a patient can have two or more rare diseases that just happen to show themselves at the same time. That's why razors are guidelines, not tests.
Razors are really just heuristics allowing us to quickly apply scientific principles during investigation. Just like mental heuristics, they create a bias. Hitchens's razor is a bias towards evidence. Alder's razor is a bias towards falsifiability. Occam's razor is a bias towards parsimony. These are good biases to have.