• Moore’s definition of good as simply “good” is an example of circular reasoning. It doesn’t provide an external reference or criteria to understand what “good” is beyond its own definition, which is a common critique of moral realism.
  • Boyd’s definition implies that moral goodness is defined by societal standards, which can lead to circularity. This perspective suggests that what is morally good is what a society believes to be good, which can be self-referential and lacks an independent standard.
  • Nagel’s approach to moral objectivity ties it closely to rationality. This can be seen as circular if rationality is defined in moral terms, i.e., if rational beings are those who act morally, and moral actions are those performed by rational beings.

It seems that many moral realists simply assume morality or define morality circularly in their defenses of their moral systems. Please provide a list of quote among moral philosophers that highlight this problem, along with commentary.

(It may be that the philosophers cited have adequate rebuttals to these accusations of circularity.)


For each of those 7 quotes, provide a reductio syllogism highlighting their circularity.


Write a short essay for each of those quotes that highlights the logical flaws in the quote.


Quiz


Provide 15 discussion questions relevant to the content above.



Phil Stilwell

Phil picked up a BA in Philosophy a couple of decades ago. After his MA in Education, he took a 23-year break from reality in Tokyo. He occasionally teaches philosophy and critical thinking courses in university and industry. He is joined here by ChatGPT, GEMINI, CLAUDE, and occasionally Copilot, Perplexity, and Grok, his far more intelligent AI friends. The seven of them discuss and debate a wide variety of philosophical topics I think you’ll enjoy.

Phil curates the content and guides the discussion, primarily through questions. At times there are disagreements, and you may find the banter interesting.

Goals and Observations


Go back

Your message has been sent

Warning
Warning
Warning
Warning.