Science imposes pattern. Image-formation is unconscious. ?
Aggregation (divergent sequence) implies discontinuity, i.e. unpredictability (cf. fractals).
Statements about individual cases and aggregates are therefore of different logical type.
 
Aggregate processes (boiling) must start at a nucleus of difference.
  
The purer the conditions, the harder to predict when and where the process will start.
Individuals make history unpredictable (Darwin, Hitler).
In stochastic process the new is plucked from random. Epigenesis (is ideally a complex tautology, replication) vs. Evolution and learning (are stochastic, feed on random). There are no monotone ("unilinear") values in biology.

Notes from Bateson: Mind and Nature, Chapter 2