Comparing Understanding of Concepts

The comparison is drawn between understanding dark matter and fundamental moral truth, suggesting that just like proving moral intuition or the existence of the external world might be seemingly impossible, proving the truth about dark matter or the nature of reality could also be beyond scientific reach. The speaker indicates that while proving concepts like pleasure is good or the external world's existence is challenging, it might be equally improbable to scientifically prove concepts like the nature of dark matter or the truth of induction.