On the "sequence" issue I think this is probably the key section of DeWitt's view on that question:
With the continual caveat that (1) Epicurus' philosophical perspective might not be the same at all as what modern science is looking at, and (2) we need to be constantly on guard as to the implications of any particular approach.
I believe DeWitt to be correct at least insofar as he is stressing that there is a human functioning process that Nature set up for us to use to determine what to consider to be "true," and that this biological process is not "abstract reason" or "abstract logic." That would be the takeaway of most any version of the whole "canon of truth" discussion.
At this point I don't know what LFB's takeways would be. I did finish listen to the podcast today however, and I agree that we would expect her takeaways to be similar.