How at his trial did Socrates explain that the Oracle of Delphi had said he was the wisest in Athens? By pointing out that unlike others in Athens at the time, he did not claim to know that which he knew not.
SEM embraces Scientific Method but with the proviso that scientists have to remain impartial and look sincerely for ways of falsifying their legitimate conclusions.
Through distinct channels more of the ancient Grecian writings were revealed to scholars during and after the Crusades. Dr Stephen Meyer in his work 'The Return of the God Hypothesis' details how the Bishop of Lyon in 13th Century insisted that rationality is derived from God and not Man. Therefore, there is 'Contingent Rationality' because God decides what that is and Him alone. This is complimented by Intelligibilty and Fallability: Man has the faculty to understand this rationality but is prone to error in doing so.
It is never the case that a theory cannot be challenged. Neither is it true that there is only one theory. If all of the available evidence demonstrates that the Earth goes around the Sun and that cannot be falsified; then it stands. Similarly, if evidence shows that the Sun goes around the earth while the planets go around the Sun, without falsification, this stands too. This is the Galileo principle of following the science wheresoever it may lead.
It's not too difficult to imagine a world in which only the expert gets treated as knowledgeable whilst the enquiring amateur is disqualified and treated as ignorant. However, this narrow view of qualification may be challenged through comprehensive enquiry and indeed parts of British law recognises this. An auditor of a company's accounts (balance sheet and profit and loss) is indeed disqualified on these narrowest of terms because he does not run the business itself and lacks 'hands on' expertise. However, is expertise necessary given that the auditor's remit is to form an opinion as to the truth (accuracy) and fairness (completeness) of the accounts? Gathering relevant and sufficient evidence from different sources, the auditor applies different levels of importance to each source, paying particular attention to exceptions that do not corroborate as appropriate. The conclusions reached either confirm the goal of 'truth and fairness' or rejects it on the basis of misdemeanor or a phelony should accounts be regarded as misleading or meaningless. It's about rigorous enquiry and research for reliable and relevant evidence sufficient to draw conclusions therefrom.