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pesenti

3,137 karma · joined November 12, 2012

Founder Sizzle AI. Ex VP of MetaAI, BenevolentAI, IBM Watson, Vivisimo (co-founder).
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pesenti··on Testing Firefox more efficiently with machine learning
Similar work done at Facebook: https://engineering.fb.com/developer-tools/predictive-test-s...
pesenti··on Ad Boycott of Facebook Keeps Growing
I am an immigrant in the US. My family uses FB products (FB App, WhatsApp, Portal) to stay in touch across the world. It really improves our lives.

It doesn't mean I believe everything that's done on our products is good for the world, but I do believe the good outweighs the bad by a wide margin. A big part of my job is to make sure that this margin increases.

pesenti··on Ad Boycott of Facebook Keeps Growing
I have answered part of your question before: https://news.ycombinator.com/item?id=19036507

Happy to answer more.

pesenti··on Facebook's ‘oversight board’ is proof that it wants to be regulated by itself
I am curious, given the international nature of Facebook which makes it hard to rely on country authorities to settle content moderation disputes: what would be a better alternative? (Disclaimer: I work at FB)
pesenti··on CMU Robotics Prof. Breaks Down Robot Scenes from Film and TV (Wired, 20m video)
We need robots who look like Chris Atkeson, he is more personable than Santa.
pesenti··on Facebook uses 1.5B Reddit posts to create chatbot
I have answered similar questions on HN before. See https://news.ycombinator.com/item?id=19036507 for example.
pesenti··on Facebook uses 1.5B Reddit posts to create chatbot
It does work pretty well with changes of topic (often integrating the broader context as long as it fits into a few turns).
pesenti··on Facebook uses 1.5B Reddit posts to create chatbot
The bot is really optimized on engagingness rather than humanness - in particular this is how we chose the hyper parameters. We did evaluate Meena vs. Human (31 vs. 69) and Meena vs. BlenderBot (35 vs. 65). But didn't do BlenderBot vs. Human. Good suggestion though.
pesenti··on Facebook uses 1.5B Reddit posts to create chatbot
The team put a lot of effort on dialog safety. You can find more info here: https://parl.ai/projects/dialogue_safety/ and the paper here: https://arxiv.org/abs/1908.06083.

Still, unlike Tay, we purposely did not create a service for it and do not advise creating one. This is for research purpose only and more effort needs to be made on safety before it can me more broadly consumed.

pesenti··on Facebook uses 1.5B Reddit posts to create chatbot
We are evaluating the possibility. But this is really for research only. To go beyond that we need further improvements to the safety layer.
pesenti··on Facebook uses 1.5B Reddit posts to create chatbot
That's definitely a fair concern. We believe that open science and transparency are the right approach here. By releasing it, we ensure that everyone is on the same page with respect to abilities and defense.
pesenti··on Facebook uses 1.5B Reddit posts to create chatbot
Blog post: https://ai.facebook.com/blog/state-of-the-art-open-source-ch...

Paper: https://arxiv.org/pdf/2004.13637.pdf

Open Source: https://parl.ai/projects/recipes/

Ask us anything, the Facebook team behind it is happy to answer questions here.

pesenti··on Sometimes, requiring explanability is counterproductive
Einstein had a great quote: "The most incomprehensible thing about the world is that it is comprehensible." Well, turns out, a lot of the world is not comprehensible. And that's what made Einstein irrelevant for the latter part of his life.

Our overestimation of the comprehensibility of the world may very well be some version of the Drunkard's search principle. We are much more likely to know about what's comprehensible than what's not.

pesenti··on Sometimes, requiring explanability is counterproductive
For those not on FB:

Link: https://www.scientificamerican.com/article/no-one-can-explai...

"We often hear that AI systems must provide explanations and establish causal relationships, particularly for life-critical applications. Yes, that can be useful. Or at least reassuring.

But sometimes people have accurate models of a phenomenon without any intuitive explanation or causation that provides an accurate picture of the situation. In many cases of physical phenomena, "explanations" contain causal loops where A causes B and B causes A.

A good example is how a wing causes lift. The computational fluid dynamics model, based on Navier-Stokes equations, works just fine. But there is no completely-accurate intuitive "explanation" of why airplanes fly. Is it because of Bernoulli principle? Because a wing deflects the air downwards? Because the air above the wing want to keep going straight but by doing so creates a low-pressure region above the wing that forces the flow downwards sucks the wing upwards? All of the above, but none of the above by itself.

Now, if there ever was a life-critical physical phenomenon, it is lift production by an airliner wing. But we don't actually have a "causal" explanation for it, though we do have an accurate mathematical model and decades of experimental evidence.

You know what other life-critical phenomena we don't have good causal explanations for? The mechanism of action of many drugs (if not most of them). An example? How does lithium treat bipolar disorder? We do have considerable empirical evidence provided by extensive clinical studies.

This is not to say that causality is not an important area of research for AI. It is. But sometimes, requiring explanability is counterproductive."

pesenti··on Facebook Pledges $130M to Fund “Supreme Court” for Content
Hey I am a Facebook employee and I am really confused by all the comments here. Really feels like a "Damned if you do/Damned if you don't" situation. Can anybody actually suggest a better alternative? Not saying there isn't one, I am just not seeing one being proposed.
pesenti··on WhatsApp sues NSO Group for allegedly helping spies hack phones around the world
WaPo Oped https://www.washingtonpost.com/opinions/2019/10/29/why-whats...
pesenti··on Facebook launches Portal TV, a $149 video chat set-top box
My team developed Detectron (https://github.com/facebookresearch/Detectron) and Detectron2 (PyTorch version, coming soon). Another team optimized it for mobile. A third team integrated it with Portal.
pesenti··on Facebook launches Portal TV, a $149 video chat set-top box
>Do you trust Facebook to adhere to their publicly stated privacy policy?

Yes. Definitely.

> Do you think they have honored those policies in the past?

I believe they have though I have not been at Facebook very long so I don't have full visibility on this. But I don't think that's the most important question. The most important question is: were these policies strong enough? The answer is definitely no and that's why the company is pivoting: https://www.youtube.com/watch?v=UtxPdezclYw&feature=youtu.be

pesenti··on Facebook launches Portal TV, a $149 video chat set-top box
The smart camera automatically follows and zooms in people. This ads shows it in action: https://www.youtube.com/watch?v=oZVFzDjBBq8
pesenti··on Facebook launches Portal TV, a $149 video chat set-top box
More info about the underlying technology: https://ai.facebook.com/blog/smart-camera-portal-advances

More info about the privacy settings: https://portal.facebook.com/privacy/

Disclosure: I work at FB, my team developed the underlying MaskR-CNN technology.

pesenti··on You Can Now Tell Facebook to Delete Its Internal Record of Your Face
You identify that there is a face yes, that's face detection, https://en.wikipedia.org/wiki/Face_detection, which is not the same as face recognition and doesn't need a model per person.
pesenti··on You Can Now Tell Facebook to Delete Its Internal Record of Your Face
No: https://news.ycombinator.com/item?id=20903110
pesenti··on You Can Now Tell Facebook to Delete Its Internal Record of Your Face
No we don't. See https://news.ycombinator.com/item?id=20903110
pesenti··on You Can Now Tell Facebook to Delete Its Internal Record of Your Face
No we don't. I answered in more details here: https://news.ycombinator.com/item?id=20903110.
pesenti··on You Can Now Tell Facebook to Delete Its Internal Record of Your Face
https://news.ycombinator.com/item?id=20901808
pesenti··on You Can Now Tell Facebook to Delete Its Internal Record of Your Face
> How do you feel working at Facebook?

See https://news.ycombinator.com/item?id=19036507 or https://news.ycombinator.com/item?id=20768607

> Do you feel pressure from your peers on the outside about the moral compass of the company?

Pressure is too strong a word. I do get into discussions with friends and family on the topic.

> My impression is that a lot of engineers are opposed to how Facebook operates and that this reputation must make recruiting and retention difficult.

That's mostly not accurate. Remember that these engineers can freely express their opinion internally or question Zuck live every week.

pesenti··on You Can Now Tell Facebook to Delete Its Internal Record of Your Face
We don't discard anything because we don't specifically identify or recognize these faces in the first place.

I don't think we go back to old photos, I suspect it would not be practical. But I am not positive on this one.

pesenti··on You Can Now Tell Facebook to Delete Its Internal Record of Your Face
Can you elaborate on the "gaps"? See my other answers. I am trying to be as precise as one can be.
pesenti··on You Can Now Tell Facebook to Delete Its Internal Record of Your Face
Thanks. 20 years in the states and still not getting it right at times ;-)
pesenti··on You Can Now Tell Facebook to Delete Its Internal Record of Your Face
The problem is that language is ambiguous and it’s important to be accurate. I do believe that intent wise, it answers the question the way you would prefer. Let me explain.

In the case you describe, Facebook no longer creates a Face Template, that is some kind of ML model of your face that could be used to recognize it or identify that you are the same person appearing across new pictures.

But I can’t say Facebook no longer has a record of your face. It still has some pictures, uploaded by your friends, where you appear. It won’t know that it's you OR and if your friends upload two pictures where you appear, it won't know that the same person is in both unless they tag you manually (which they can only do if you are user and authorize them - but that's a different setting).

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