Would the Daily Mail website fall foul of the online porn filters it has championed?

Ban this sick filth. No, not THIS sick filth, obviously.

David Cameron wants to block online porn, the Daily Mail reported approvingly this morning.

 

Now comes the big question: where the line should be drawn. If you're too lax, things slip through the filter; if you're too strict, non-pornographic images or sites get caught in the net. How do you tell what's pornographic and what isn't? "I know it when I see it," said Justice Potter Stewart in 1964. But it isn't that simple.

Despite the best efforts of programmers everywhere, you can't just tell a computer "block any page with an image or video of a female nipple or male or female genitalia" (a rule which, itself, would be hopelessly over-strict; farewell Titian! So long, Leonardo!). Instead, most blocking software uses contextual clues on the page to work out whether the site itself is problematic. That can be obvious: there are few safe-for-work sites which use the phrase "double penetration", for instance. Except this site, now – which explains part of the issue.

Existing filters show that if you want to make the blocking comprehensive, some of the contextual clues used have to be broad enough to make collateral damage certain. Blocking anatomical terms like "vagina" or "anus", for instance, frequently leads to sites discussing sexual health or feminist topics being caught up.

Meanwhile, humans - being cleverer than filters - learn to use terms which can't be blocked because they also have innocuous uses. (Take, at the extreme end, the use of "Lolita" to denote images of child abuse.)

The thing is, even if all the technological quirks were worked out, drawing the line is still hard, just in terms of choosing how prudish we as a nation are. So where do we start blocking?

Pictures of women in their underwear?

 

 

Sexual, nude but non-explicit photos?

 

 

Pictures of women with clearly visible breasts?

 

 

Topless pictures of prostitutes in 1940s Paris?

 

 

Playboy style photo-shoots?

 

 

Non-explicit pictures of people having sex?

 

 

Well, would you want your children seeing that kind of material? Ban this sick filth.

Oh, Daily Mail. Photograph: dailymail.co.uk

Alex Hern is a technology reporter for the Guardian. He was formerly staff writer at the New Statesman. You should follow Alex on Twitter.

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Why isn't Labour putting forward Corbynite candidates?

Despite his successes as a candidate, the organisational victories have gone the way of Corbyn's opponents. 

The contest changes, but the result remains the same: Jeremy Corbyn’s preferred candidate defeated in a parliamentary selection. Afzhal Khan is Labour’s candidate in the Manchester Gorton by-election and the overwhelming favourite to be the seat’s next MP.

Although Khan, an MEP, was one of  the minority of Labour’s European MPs to dissent from a letter from the European parliamentary Labour party calling for Jeremy Corbyn to go in the summer of 2016, he backed Andy Burnham and Tom Watson in 2015, and it is widely believed, fairly or unfairly, that Khan had, as one local activist put it, “the brains to know which way the wind was blowing” rather than being a pukka Corbynite.

For the leader’s office, it was a double defeat;  their preferred candidate, Sam Wheeler, was kept off the longlist, when the party’s Corbynsceptics allied with the party’s BAME leadership to draw up an all ethnic minority shortlist, and Yasmine Dar, their back-up option, was narrowly defeated by Khan among members in Manchester Gorton.

But even when the leadership has got its preferred candidate to the contest, they have been defeated. That even happened in Copeland, where the shortlist was drawn up by Corbynites and designed to advantage Rachel Holliday, the leader’s office preferred candidate.

Why does the Labour left keep losing? Supporters combination of bad luck and bad decisions for the defeat.

In Oldham West, where Michael Meacher, a committed supporter of Jeremy Corbyn’s, was succeeded by Jim McMahon, who voted for Liz Kendall, McMahon was seen to be so far ahead that they had no credible chance of stopping him. Rosena Allin-Khan was a near-perfect candidate to hold the seat of Tooting: a doctor at the local hospital, the seat’s largest employer, with links to both the Polish and Pakistani communities that make up the seat’s biggest minority blocs.  Gillian Troughton, who won the Copeland selection, is a respected local councillor.

But the leadership has also made bad decisions, some claim.  The failure to get a candidate in Manchester Gorton was particularly egregious, as one trade unionist puts it: “We all knew that Gerald was not going to make it [until 2020], they had a local boy with good connections to the trade unions, that contest should have been theirs for the taking”. Instead, they lost control of the selection panel because Jeremy Corbyn missed an NEC meeting – the NEC is hung at present as the Corbynsceptics sacrificed their majority of one to retain the chair – and with it their best chance of taking the seat.

Others close to the leadership point out that for the first year of Corbyn’s leadership, the leader’s office was more preoccupied with the struggle for survival than it was with getting more of its people in. Decisions in by-elections were taken on the hop and often in a way that led to problems later down the line. It made sense to keep Mo Azam, from the party’s left, off the shortlist in Oldham West when Labour MPs were worried for their own seats and about the Ukip effect if Labour selected a minority candidate. But that enraged the party’s minority politicians and led directly to the all-ethnic-minority shortlist in Manchester Gorton.

They also point out that the party's councillor base, from where many candidates are drawn, is still largely Corbynsceptic, though they hope that this will change in the next round of local government selections. (Councillors must go through a reselection process at every election.)

But the biggest shift has very little to do with the Labour leadership. The big victories for the Labour left in internal battles under Ed Miliband were the result of Unite and the GMB working together. Now they are, for various reasons, at odds and the GMB has proven significantly better at working shortlists and campaigning for its members to become MPs.  That helps Corbynsceptics. “The reason why so many of the unions supported Jeremy the first time,” one senior Corbynite argues, “Is they wanted to move the Labour party a little bit to the left. They didn’t want a socialist transformation of the Labour party. And actually if you look at the people getting selected they are not Corbynites, but they are not Blairites either, and that’s what the unions wanted.”

Regardless of why, it means that, two years into Corbyn’s leadership, the Labour left finds itself smaller in parliament than it was at the beginning.  

Stephen Bush is special correspondent at the New Statesman. His daily briefing, Morning Call, provides a quick and essential guide to British politics.