Problem: S1: He played the Montreux Jazz Festival in Switzerland in 1981 and met John McLaughlin , Billy Cobham , who popularized him with Michael Brecker and other fusion stars .
S2: He played the Montreux Jazz festival in Switzerland in 1981 and met Michael Brecker who introduced him to John McLaughlin , Billy Cobham and other fusion stars .

Do S1 & S2 convey the same information?

A: no

Problem: S1: He was an atheist in early life , but transformed into a believer in the later stages .
S2: In later life , he was an atheist , but became a believer in the early stages .

Do S1 & S2 convey the same information?

A: no

Problem: S1: Sometimes it is also convenient to pursue the purely covariant version by :
S2: It is sometimes convenient to also define the purely covariant version by

Do S1 & S2 convey the same information?

A:
yes