Vortical-Synergetic Cognition is associated with thinking in terms of evolution in time. is the function used with evolution in time according to the internal logic of Socionics. So there must be a cause-and-effect relationship between and Vortical-Synergetic Cognition.
My first hypothesis was that is in the ego block of all VSC types and not in the ego block of all nonVSC types. Counterexample: SLI is VSC but doesn't have in the ego block.
My second hypothesis was that is a valued function of all VSC types and a non-valued function of all nonVSC types. Counterexample: ESE is VSC but doesn't value . It has as most vulnerable function.
So I don't think Socionics is internally consistent.