> IF THEN OTHERWISE

Which avoids overloading OR and maintains better grammar.

But I suspect shorter words were preferable when space was a premium everywhere not least on the display itself.

  #include <stdio.h>

  #define PREACH printf
  #define SHOULD_GOD_WILL if
  #define EACH_AND_EVERY_CREATURE_UNDER_GODS_LIGHT for
  #define OTHERWISE else
  #define RETRIBUTE return
  #define ALONG_WITH &&
  #define THUS }
  #define LET {

  int main() LET
      EACH_AND_EVERY_CREATURE_UNDER_GODS_LIGHT (int i = 0; i < 100; i++) LET
          SHOULD_GOD_WILL (i % 5 == 0 ALONG_WITH i % 3 == 0) LET
              PREACH("Fizzbuzz!\n");
          THUS OTHERWISE SHOULD_GOD_WILL (i % 5 == 0) LET
              PREACH("Buzz!\n");
          THUS OTHERWISE SHOULD_GOD_WILL (i % 3 == 0) LET
              PREACH("Fizz!\n");
          THUS OTHERWISE PREACH("%d\n", i);
      THUS

      RETRIBUTE 0;
  THUS

"Utilize" first arose in 1807 if Merriam-Webster is to be believed, well past the period you're quoting; and "dost" should agree with the number of its noun "senses". ("dost" is second-person, but you need something third-person.) In this context I also don't really like the continuous present of "are you utilizing", but I can't put words to why. I believe "hast thou taken leave of thy senses" is actually recorded to be idiomatic.

By the way, ChatGPT suggests (where I've fixed its analogous error in the word "doth"):

> Pray tell, wherefore dost thou employ the term 'contrariwise'?

  greater x y
    | x > y     = x
    | otherwise = y

    if otherwise then not

    IF (condition) THEN (do-this) ELSE (do-that).

    IF (condition) THEN (do-this) OR (other-condition) THEN (do-that).