Where have you seen coinjoinement thus explained? The conjoinment is explained;
Therefore these qualities are conjoined, not disjoined, and it is not possible, having separated them one from another, to delineate the difference between them." Mahavedalla Sutta: The Greater Set of Questions-and-Answers
When you say that contact preceeds the Feeling are you saying that feeling arises in and by itself, preeceded by contact, as present is preceeded by the past?
If this is so, then therein having first separated them are you not delineating the difference between them?
In the dependent origination you quote, how do you infer that one preceeds the other?
It is not so that they can not be diserned separately, it is that having discerned them as separately it is impossible to tell them apart beyond that for each is associated with the other;
For what one feels, that one perceives. What one perceives, that one cognizes. Therefore these qualities are conjoined, not disjoined, and it is not possible, having separated them one from another, to delineate the difference among them."
Is it not so that according to you that first one cognizes one thing (A) which arises and ceases before it is succeeded by the next another thing (B) perception ie?
Again the concept of the structure of two reeds being placed against eachother, the structure is dependently arisen, ‘reed A’ is supported by ‘reed B’ and ‘reed B’ is supported by ‘reed A’, in as far there is A structure it’s supports are arisen together and not separately and casual connection can be discerned. It is not a trick but something to be understood in relation to Nama & Rupa.
In as far as there are six sense media there is objectification (thinking about and naming). So when one thinks about what one sees one can think about how it works and point out truths about what one objectifies. Therefore to point out various causes and the interplay of supports one will name them differently according to their respective function.
The point is that in the structure of reeds, reed A is reed A because reed A is thus called because it is know to have B as it’s support and is a support for B in the context of a structure, that is the meaning behind what is shortly termed ‘Reed A’.
Now if one was to dismantle the structure and point out the reed A again, it is no longer possible to say that reed A is know to have B as it’s support and is a support for B, so one is no longer talking about the same thing, reed A in the first context does not equal the reed A in the latter. So it is with the six fields of referable reality. It is not possible to postulate existence of Consciousness in and by itself and say that it is the same consciousness that is discerned as a requisite condition for the Six Sense media.
“Discernment & consciousness, friend: Of these qualities that are conjoined, not disjoined, discernment is to be developed, consciousness is to be fully comprehended.”
This is a good example how they are different and this is a good example how they are conjoined;
For what one discerns, that one cognizes. What one cognizes, that one discerns.
X is both discerned and that very X is known to be cognized. X is the referable reality which is objectified and thought about as being discerned and cognized and one can not say that the X is discernment or X is consciousness.
Thus when X is, on that account one can delineate one and the other on the same basis. Furthermore one can delineate other conditions and requisites.