The four akwān are distinguished by two questions.
Relation of two substances: If a third cannot intervene, it is conjunction; if a third could intervene, it is separation.
Successive states of one substance: If the earlier place differs, it is motion; if it is the same, it is rest.
The first pair is about a relation between two subjects; the second about successive states of one subject. An assertion of motion is therefore not analyzed in the same way as an assertion of separation.
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Accidents: Definition, Categories and the Beginning of the Origination Argument
The four akwān are distinguished by two questions.
Relation of two substances: If a third cannot intervene, it is conjunction; if a third could intervene, it is separation.
Successive states of one substance: If the earlier place differs, it is motion; if it is the same, it is rest.
The first pair is about a relation between two subjects; the second about successive states of one subject. An assertion of motion is therefore not analyzed in the same way as an assertion of separation.