As to the second part of your comment as to disagreeing with DeWitt on wisdom, could you make that a little more clear because I am not sure you spelled that out as clearly as the other part.
Sure, it seems like DeWitt thinks of Epicurean reason as just prudence only, knowing how to make proper decisions.
While that is an important part, I also think Epicurus count theoretical wisdom as well, like The Nature of the Gods, the nothingness of Death, and the limits of pain and our desires, if that makes sense.
Torquatus seems to make clear the necessity of theoretical knowledge beyond just prudence, especially in his call for science.
QuoteNatural Philosophy is what Epicurus deemed all-important. This science explains to us the meaning of terms, the nature of predication, and the law of consistency and contradiction; secondly, a thorough knowledge of the facts of nature relieves us of the burden of superstition, frees us from fear of death, and shields us against the disturbing effects of ignorance, which is often in itself a cause of terrifying apprehensions; lastly, to learn what nature's real requirements are improves the moral character also. (On Ends, 1.63)