The students *were* given the theory. ( What theory are we taking about here, anyway? Big Bang? Evolution? We were taught all of that). We weren't told a larger crackpot theory. We were just given some questions that seemed not to make sense, like who do we know that the source of radioative dating material was all undecayed at the time of formation.
Your teacher did not give you all of the any of those theories you mentioned (Big Bang, Evolution). It would have taken years of additional knowledge to fully understand either of those theories. Therefore, you got a tiny subset of the theory (most likely an English summary of the theory). So, you were never given the knowledge that would be required to answer any of the questions your teacher asked. Therefore, the only logical answer to those questions would be "I don't know, let us research the theories and fully understand them before giving you an answer", not "these theories might be flawed."
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