Just like the weather, nature made sure that there are enough influencing factors that cause changes in hand-preference, like external, societal and cultural pressures, to result in various possible genetic combinations and chance influences.
This makes the entire process of hand preference unpredictable by design.
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Human hand preference is predictably a biological and genetic (hereditary) phenomenon, but we see that 85 percent of people are right-handed.
Researchers have identified the specific gene (D Gene) that occurs more commonly among the population which responsible for promoting right-hand preference. The C gene, which is less likely to occur within our gene pool, creates a coin-toss chance of an individual being left or right-handed.
Many people avoid facts even if it is beneficial for them to know. This strange quirk that defies logic is due to many psychological factors.
Human beings often avoid learning new information, if learning can cause pain. This even implies to health information that can be extremely beneficial for them.
Consciousness is everything you experience - taste, pain, love, feeling. Where these experiences come from is a mystery.
Many modern analytic philosophers of mind either deny the existence of consciousness, or they argue that they can never be meaningfully studied by science.