Where is the boundary between a soft-question and an off-topic question?
The issue has come up in connection to question Does physics explain why the laws and behaviors observed in biology are as they are? Although I think that the question is quite interesting, and I have much to say on the subject, my first reaction was to recommend closing... perhaps precisely because there is too much to say about it, i.e., there is no a clear question with a clear answer, as is usually expected.
Yet, after a bit of discussion in the comments, and seeing that respected community members are posting the answers, I have retracted my recommendationf or closing and posted my own answer. And idneed, the question ahs tag soft-question, which suggests that it may not have a rigorous answer.
Still, the subject seems rather broad and non-specific...
The advice/recommendations/guidelines will be appreciated.