With everything we know, there is so much we do not. Making decisions based on limited knowledge is like trying to guess what a puzzle is supposed to be when most of the pieces are missing. You will most likely be wrong.
Never be ashamed to admit you do not know something. Only those who are oblivious to the obvious have cause for shame. When the truth is staring you in the face, your eyes must be closed not to see.
People with agendas will claim knowledge which is suspect. Once you pull at the loose threads, the whole tapestry falls apart. Truth is not determined, it is discovered; it cannot be decided, merely demonstrated.
Be suspicious when somebody tries to sell you anything. Knowledge is power, thus claiming to know is an attempt at asserting power over others. Some are so good at this, they can have you convinced it was your idea.
People believe what they want. Then, they amass all manner of research to prove what they already believed. Common sense takes a back seat when there is money to be had and knowledge to be claimed.
Our world is full of fake prospectors tossing gold nuggets into the water and pretending to find them. Be not deceived, they have discovered nothing. Who can claim to be wise, if they reject the wisdom of the ages?