As far as I currently understand it, for example for sights suttas present the following: eye + sights + eye viññÄáča â contact to be experienced as pleasant, painful, neutral â feeling.
Suppose, two people saw the same sight yet one considered it pleasant, the other otherwise, then the main reason for this would be in eye viññÄáča, but what is it? Currently I think a good translation is eye distinguishing knowledge. As to why I think it is viññÄáča that contributes to distinguishing how a contact is to be experienced, it is because of the definition in MN43 that says so:
They speak of âViññÄáčaâ .
How is ViññÄáča defined?
Itâs called ViññÄáča because it vijÄnÄti.
And what does it vijÄnÄti?
Sukhantipi vijÄnÄti, dukkhantipi vijÄnÄti, adukkhamasukhantipi vijÄnÄti.
âthis is pleasantâ vijÄnÄti, âthis is painfulâ vijÄnÄti âthis is neutralâ vijÄnÄti
Itâs called ViññÄáča because it vijÄnÄti.â
As an example of acquiring viññÄáča or what we call conditioning there is the example of Pavlovâs dog experiment with a bell - a dog is given meal and a bell is rang, after a while ringing the bell would make the dog expect a meal and begin salivating as it would associate the sound as pleasant. It has acquired distinguishing knowledge that the bell sound is pleasant.
Another is an example of MMORPG games. After playing for a while, a player might make the choice to consider seeing rare drops from bosses as pleasant. Then, if they see rare drop, there is eye contact + sight + viññÄáča and corresponding feeling. This reaction to sights is clearly learned.
Does MN38 MN145 speak about this?
there are sights known by the eye, which are likable, desirable, agreeable, pleasant, sensual, and arousing.
If a mendicant delights, welcomes, and keeps clinging to them, this gives rise to relishing. Relishing is the origin of suffering, I say. There are sounds known by the ear âŠ
MN38 is a bit more detailed:
When they see a sight with their eyes, if itâs pleasant they desire it, but if itâs unpleasant they dislike it. They live with mindfulness of the body unestablished and limited heart.
And they donât truly understand the freedom of heart and freedom by wisdom where those arisen bad, unskillful qualities cease without remainder. Being so full of favoring and opposing, when they experience any kind of feelingâpleasant, unpleasant, or neutralâthey delights, welcome, and keep clinging to it. This gives rise to relishing. Relishing feelings is grasping.
There are 3 actions mentioned here that one can take in relation to experiencing feelings: delights, welcomes, and keeps clinging to â gives rise to relishing. Itâs also good to check the Pali words for key phrases to get clearer on the meaning.