DO YOU REMEMBER THIS? I DON’T. WHEN “FAMILY MATTERS” DEBUTED IN 1989 ON ABC, IT FEATURED LOUIS ARMSTRONG’S “WHAT A WONDERFUL WORLD” AS ITS THEME SONG. IN THE SECOND SEASON, ABC REPLACED IT WITH A LESS SOMBER MORE UPBEAT THEME, I’M GUESSING BECAUSE LOUIS WASN’T SETTING THE RIGHT MOOD FOR TGIF, THAT SOUNDED ODDLY SIMILAR TO THE FULL HOUSE THEME CO-WRITTEN BY JOHN STAMOS WHICH DEBUTED TWO YEARS EARLIER.