My therapist told me that “P” and “J” personalities rarely mix. I require resolution, but not necessarily this second. However, once I have processed (whether it takes me 10 minutes or 2 days), I am ready to have concrete answers and solutions. The “need answers rather than ambiguity” is not about processing, rather it’s about personality.
Js tend to need resolution, while Ps are pretty cool with the 50,000 shades of grey you mention.
For myself, I have found my therapist’s words to be accurate: Ps are fine as friends but drive me crazy as beaus (and I’m sure I drive them crazy, too). But there are always exceptions and certainly many successful P/J couples!
As always, many thanks for reading and responding, Dick!