Problem: S1: In 1958 he spoke throughout East Asia and in Western Europe , and in 1961 in Northern Ghana .
S2: In 1958 he spoke throughout East Asia and Western Europe and in 1961 in Northern Ghana .

Do S1 & S2 convey the same information?

A: yes

Problem: S1: His father has called him Ali , and his nickname was Murtaza .
S2: His father called him Ali and his nickname was Murtaza .

Do S1 & S2 convey the same information?

A: yes

Problem: S1: There are many branches of classical mechanics , such as : statics , dynamics , kinematics , continuum mechanics ( which includes fluid mechanics ) , statistical mechanics , etc .
S2: There are many branches of fluid mechanics , such as statics , dynamics , kinematics , continuum mechanics ( including statistical mechanics ) , classical mechanics , etc .

Do S1 & S2 convey the same information?

A:
no