Thanks to stormdog I just saw the perfect illustration of this tactic, although not using that exact phrase, from Nigel Farage - who I bet scattered "It could be argued that" all over his school essays. It's in this article about the reaction to the London bombings on Fox News. Were internment camps a good way to go, mused the incisive analysts of Fox? (For the benefit of those reading outside the UK, no mainstream British politician - by which for this purpose I mean a politician from a party with more MPs than zero - has suggested it.)
Who better to ask than Nigel Farage? Like one of my bet-hedging students (Farage was a professional bet-hedger when he worked in the City, trading commodities, and the instinct is still strong) Farage doesn't call for internment. He says (of people on police watch lists) "if there is not action, then the calls for internment will grow" and, "unless we see the government getting tough, you will see public calls for those 3,000 to be arrested".
Did he just call for internment? Of course not - how dare you suggest such a thing! He was merely acting as a commentator! (Unless it happens, and then he'll be able to say he was brave enough to float the idea.)
And then of course, along comes Katie Hopkins of the Daily Heil like the organ-grinder's monkey, repeating his sentiment but minus the hedge, proving Farage's words true in the process: “We do need internment camps.” What a double act!
A few people on Facebook were bemused by my dislike of "It could be argued that", implying that it was perhaps a bit over the top. This is why I try to drum into people that it's a cowardly and dishonest tactic, whether you're talking about the date of a sonnet or the best reaction to an atrocity.
Nigel Farage uses it, for heaven's sake!