As an expression of spirituality, collective worship is much more contestable now than it was in Britain in the 1940s.
Its impact on state behaviour is, however, more contestable.
As Europe becomes a more "contestable market" with more integrated pipelines, more liquefied natural gas and more shale gas, behavior will change.
Their biggest threat is counterattacking through Hogg but eventually teams will attempt to starve him of opportunities by favouring more contestable kicks.
But others are more contestable.
While at times it feels like filmmaker Laura Brownson lets the former activist Rachel Dolezal off easy on some of her more contestable claims, the film offers a unique window onto the frontlines of identity politics in America.
While modern research remains wondrously productive, its results are more ambiguous, contestable and dubious than ever before.
Quantification, he wrote, "is more readily contestable and likely to be contested".
To be sure, the definition of what's fair (as opposed to what's cheating) isn't any less contestable than the notion of what's normal.
The AustralAsia Railway Corporation, which oversaw the line's construction, says it has captured more than 90% of "contestable freight" on the Alice-Darwin corridor.
