Conditio sine qua non

Background:

Human knowledge might come from experiments, experience, et cetera. This standard can be applied  rigorously to conditions and causation too. Instead of taking necessary conditions for granted, human beings are challenged  to consider what  allows us to know about this relationship.
Methods:
The usual mathematical rules were used. Examples are presented to illustrate the methods developed in detail.
Results:
Of two events, A and B, we say that A is a necessary condition for B when an event B cannot occur without an event A.
Conclusion: 
It is possible to detect necessary condition relationships (within a dataset).