the rule is simple just start the reply with a
WHAT COULD HAVE HAPPENED IF....
and then add the what if's you have in mind XD
then answer the what if of the user above you with the wisest reply ever!?!?!?!
and after you answer the what if question make your own what if question ^^ easy right?
for example:
what could have happened if adam ate the first bite from the apple?
then he would have not shared it to eve XD
what could have happened if einstein went to school and graduated?
<end of example ^^>