Are the teachings of Buddha timeless?

I have been debating with several people in Facebook’s Buddhist groups as to whether Buddha’s teachings are timeless or temporal. To some traditional Buddhists, even the suggestion that some of Buddha’s teachings are not timeless is offensive. I am an independent researcher who has been studying Buddhism for almost three decades. To me, the very notion that all of Buddha’s teachings are timeless violates the Three Marks of Existence. Buddhist scholar, Walpola Rahula, rendered two of the marks as:

All conditioned things are impermanent (Sabbe SAṂKHĀRĀ aniccā)

All dhammas are without self’(Sabbe DHAMMĀ anattā).

Because Buddha’s teachings are also conditioned things, therefore they are impermanent and not timeless. And because Buddha’s teachings are part of the dhammas(i.e. the universe of both conditioned and unconditioned things), therefore they too are without self. In Buddhism, a self denotes an independently existing entity. Buddha’s teachings too are without self because they are products of their particular place and time. To think that Buddha’s own teachings are independent of their particular social and cultural environment would contradict both the teaching of anatta and the secular understanding of sociology.

To seek another opinion, I asked the AI chatbot, Chat GPT, whether Buddha’s teachings…