Yesterday I got my Sept issue of QST...and glancing thru it I happened upon "The World Above 50MHZ"
with a subline "Making a Valid Contact". Joe Taylor, K1JT, brings up some points in the second para-
graph...but one sentence stood out among all the rest..."Thus, sending or receiving a "73" message
is not required for a complete, valid contact in FT8 or other modes." Have a good day...Sam W8VVE