Facebook’s chief AI scientist Yann LeCun’s influence seems to have rubbed off on the team, taking a path less travelled – a journey towards self-supervision. This path/method does not rely on data that’s been labelled for training purposes by humans – or even on weakly-supervised data like images and videos with public hashtags – instead, self-supervision takes advantage of entirely unlabelled or new data.
What was once a research strategy for Facebook AI teams – over the years – has turned into an area of scientific breakthrough – where they have been delivering strong internal results, with some self-supervised language understanding models, libraries, frameworks, and experiments consistently beating traditional systems or fully supervised models.
For instance, its pre-trained language model XLM, first introduced in 2019, is accelerating important applications at Facebook today, like proactive hate speech detection. Its XLM-R, which uses RoBERTa architecture, improves hate speech classifiers in multiple languages across Facebook and Instagram.
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Here’s a timeline of Facebook’s journey towards self-supervised learning, highlighting some of the key milestones where it has implemented self-supervised methods in one way or another.
The Chilling Effect
Facebook is currently exploring self-supervised learning in various fields, including robotics, visual reasoning, and dialogue systems, etc. It believes that these efforts will help them further improve tools to keep people safe on their platform, alongside helping them connect across different languages and advance AI in new ways.
However, the recent whistleblower and outage controversies say otherwise. Recently, Facebook whistleblower Frances Haugen claimed that the company puts profits over people’s safety. To this, Facebook chief Mark Zuckerberg, in a blog post, said that many of the claims made by the whistleblower, based on the document she leaked – ‘do not make any sense.’ “If we wanted to ignore ‘research,’ why would we create an ‘industry-leading research programme‘ to understand these crucial issues in the first place?” he added.
Further, Zuckerberg said if we did not care about fighting harmful content, why are we employing so many people dedicated to this, compared to other companies in the space — even those bigger than us? “If we wanted to hide our ‘results,’ why would we have established an ‘industry-leading standard’ for transparency & reporting on what we are doing?”
Moving past the controversy, Facebook AI research scientist Alex Berg, two years ago, had said that face recognition approaches – for example – are surprisingly accurate and robust, to the point where face verification is sometimes used as a primary method to unlock mobile phones. Facebook is working on self-supervision in this area, where an algorithm could identify potential attributes and learn to recognize them without supervision.
Towards Human-Level Intelligence
Today, Facebook has become synonymous with self-supervision – perhaps the most important frontier of artificial intelligence – replacing data-limited supervised learning with unlimited self-supervised learning.
Interestingly, Facebook has also created a lot of buzz around self-supervised learning, to an extent where it is ahead of its peers – Microsoft, Amazon, Google and DeepMind. The graph below illustrates this purely on the basis of work and experiments published on its website around self-supervised learning.
Since its inception in 2013, Facebook AI Research (FAIR) has continued to expand its research efforts in self-supervised learning, training machines to reason, and training them to plan and conceive complex sequences of actions via open scientific research. Facebook believes that self-supervision is one step on the path to human-level intelligence, and in the long run, the progress would be cumulative.