That's the points difference sorted. So I think the permutations (not involving typhoons) are in ascending order of straw-clutchiness:
- Beat Japan by 8 points or more and if Japan score 4 tries, Scotland must also score 4 tries
- Beat Japan by less than 8 points but score 4 tries and stop Japan scoring 4 tries
- Beat Japan other than the 2 ways above or draw and Samoa beat Ireland