Rugby is a game well suited to the application of physics - a good big man will always beat a good little man has been a guiding principle for about as long as the ball has been oval.
In the case of Taranaki's switching of allegiance from the Hurricanes to the Chiefs, here's another equation - for every action there is a reaction. The decision to change, mooted long ago but only confirmed yesterday, appears to be good business sense, and yet it comes with strings attached.
Fed up with being given short shrift by the Hurricanes, who allocated what amounted to second-rate South African teams to New Plymouth every second year, the Taranaki union has voted with its wallet, effectively buying a share of the Chiefs' licence for the next seven years.
As a result they have been awarded the plum tie of the Chiefs versus the Blues at Yarrow Stadium on May 9, and will host another big one in the Chiefs versus the Waratahs three weeks later. They will get another two games in 2015, before, no doubt, the various bosses get around the table to discuss the fixture list for the next couple of seasons.
Here's where it could get a little sticky, because Taranaki, an ambitious and relatively well-off ITM Cup Premiership union, adds a new dimension to what has become, from the outside looking in anyway, a close franchise (winning consecutive titles tends to help foster a certain goodwill too).