“…via Russells paradox. Arguing that contradictions are not necessarily devastating in a paraconsistent setting, these authors reinstate the axiom scheme of Comprehension as acceptable, allow the formation of the Russell set R, and conclude that both R ∈ R and R ∈ R are true, see [8,23,31,32,33,34]. Now, on PST of the second group the following papers can be mentioned [9,10].…”