-If we receive message and it's sequence number is not equal to one we
-are expecting, then it is new message. If we receive message and it's
-sequence number is the same as one we are expecting, but it's
-acknowledge is not equal acknowledge number in original message + 1,
-then it is new message.
+If we receive a message and its sequence number is not equal to one we
+are expecting, then it is a new message. If we receive a message and
+its sequence number is the same as one we are expecting, but its
+acknowledge is not equal to the acknowledge number in the original
+message + 1, then it is a new message.