Knowledge is preserved through reliable teaching, recognized references, correction of mistakes, and consultation with competent specialists. Accumulating online posts or forwarding viral statements is not the same as safeguarding knowledge.
For example, a family inheritance question may involve several heirs and exceptions. An untrained person should not invent percentages, but direct the case—with complete facts—to a qualified scholar or expert.
Recognizing the limits of one’s knowledge is a strength; issuing definitive rulings without it is dangerous.