Conditio sine qua non

Aim: Different processes or events which are objectively given and real are equally one of the
foundations of human life (necessary conditions) too. However, a generally accepted, logically
consistent (bio)-mathematical description of these natural processes is still not in sight.
Methods: Discrete random variables are analysed.
Results: The mathematical formula of the necessary condition is developed. The impact of study
design on the results of a study is considered.
Conclusion: Study data can be analysed for necessary conditions.