The transitive property of geometry: if a=b and b=c then a=c
a = there is Christmas music playing on the radio
b = it is the holidays
c = it is now appropriate to follow the workout routine listed on the napkins
1) We can all agree that a=b.
2) The napkins prove that b=c.
3) Therefore, a=c. Since there is christmas music on the radio, then the holiday workout is now acceptable. You’re welcome and Happy Holidays!