Original sentence: The two envelopes problem is a puzzle or paradox within the subjectivistic interpretation of probability theory; more specifically within Bayesian decision theory.This is still an open problem among the subjectivists as no consensus has been reached yet
Edited sentence: Its resolution can be formulated based on elementary probability concepts accessible to high school and undergraduate students.Subtle changes, minor distinctions and many variations.The two envelopes problem is a puzzle or paradox within probability theory; more specifically within decision theory.have lead to futile controversies, and many find the paradox still disturbing