1 00:00:01,640 --> 00:00:04,040 The following content is provided under a Creative 2 00:00:04,040 --> 00:00:05,580 Commons license. 3 00:00:05,580 --> 00:00:07,880 Your support will help MIT OpenCourseWare 4 00:00:07,880 --> 00:00:12,270 continue to offer high quality educational resources for free. 5 00:00:12,270 --> 00:00:14,870 To make a donation, or view additional materials 6 00:00:14,870 --> 00:00:18,830 from hundreds of MIT courses, visit MIT OpenCourseWare 7 00:00:18,830 --> 00:00:20,000 at ocw.mit.edu. 8 00:00:23,327 --> 00:00:25,160 TOMASO POGGIO: This problem of intelligence, 9 00:00:25,160 --> 00:00:27,950 it's one of those problems that mankind has been busy with it 10 00:00:27,950 --> 00:00:30,710 for the last 2,000 years or so. 11 00:00:30,710 --> 00:00:35,120 But 50 years ago or so, that was the start 12 00:00:35,120 --> 00:00:36,620 of artificial intelligence. 13 00:00:36,620 --> 00:00:43,160 It was a conference in Dartmouth, '62 or so, 14 00:00:43,160 --> 00:00:46,460 with people like John McCarthy and Marvin Minsky, 15 00:00:46,460 --> 00:00:49,570 who coined the term artificial intelligence. 16 00:00:49,570 --> 00:00:53,540 And at that time, progress was made. 17 00:00:53,540 --> 00:00:55,720 Progress has been made, especially in the last 20 18 00:00:55,720 --> 00:00:56,219 years. 19 00:00:56,219 --> 00:00:57,070 I'll go through it. 20 00:00:59,840 --> 00:01:02,600 But they relied, really, only on computer science 21 00:01:02,600 --> 00:01:04,430 and common sense. 22 00:01:04,430 --> 00:01:07,040 And in the meantime, there are all these other disciplines 23 00:01:07,040 --> 00:01:09,470 which have made a lot of progress, 24 00:01:09,470 --> 00:01:12,110 and that are very likely to play a key role 25 00:01:12,110 --> 00:01:20,090 in the search for answers to the problem of intelligence. 26 00:01:20,090 --> 00:01:25,850 So it was obvious that we needed different expertises. 27 00:01:25,850 --> 00:01:29,200 Not all in computer science, but in other ones. 28 00:01:29,200 --> 00:01:32,630 And so, this was the people that we put together 29 00:01:32,630 --> 00:01:36,560 from different labs, from neuroscience, from computer 30 00:01:36,560 --> 00:01:40,190 science, from cognitive science, and from a number 31 00:01:40,190 --> 00:01:44,120 of institutions in the US. 32 00:01:44,120 --> 00:01:46,520 Especially MIT and Harvard. 33 00:01:46,520 --> 00:01:52,100 Let me tell you a bit more about the background here. 34 00:01:52,100 --> 00:01:56,750 This idea of merging brain research and computer 35 00:01:56,750 --> 00:02:02,240 science in the quest to understand intelligence. 36 00:02:02,240 --> 00:02:07,250 Part of the reason for this was progress and convergence 37 00:02:07,250 --> 00:02:09,139 we saw between different disciplines. 38 00:02:09,139 --> 00:02:13,130 And one of them was progress in AI. 39 00:02:13,130 --> 00:02:15,500 And this started, really, with Deep Blue, 40 00:02:15,500 --> 00:02:17,650 I guess it was called at the time. 41 00:02:17,650 --> 00:02:25,820 The machine IBM that managed to beat Kasparov at chess 42 00:02:25,820 --> 00:02:27,770 for the world championship. 43 00:02:27,770 --> 00:02:32,810 And then, of course, there was Watson beating champions 44 00:02:32,810 --> 00:02:34,310 in Jeopardy. 45 00:02:34,310 --> 00:02:39,620 And things like drones able to land on aircraft carriers. 46 00:02:39,620 --> 00:02:45,150 So that's the most difficult thing for the pilot to do. 47 00:02:45,150 --> 00:02:49,760 And in the meantime, things had continued to go pretty fast. 48 00:02:49,760 --> 00:02:54,140 This was the cover of Nature, probably eight months 49 00:02:54,140 --> 00:02:55,370 ago or so. 50 00:02:55,370 --> 00:02:58,940 DeepMind, which is one of our industrial partners 51 00:02:58,940 --> 00:03:02,600 in the center, has developed an artificial intelligence 52 00:03:02,600 --> 00:03:05,900 called DeepQ I think, that learned 53 00:03:05,900 --> 00:03:11,870 to play better than humans, 49 classical Atari games. 54 00:03:11,870 --> 00:03:14,285 By itself. 55 00:03:14,285 --> 00:03:18,280 And this was two or three months ago, 56 00:03:18,280 --> 00:03:22,515 a cover of a Nature supplement, on artificial intelligence 57 00:03:22,515 --> 00:03:23,390 and machine learning. 58 00:03:26,710 --> 00:03:30,280 This is showing a system by Mobileye, 59 00:03:30,280 --> 00:03:36,030 this is an old video, that gives vision to cars. 60 00:03:36,030 --> 00:03:38,290 There is a camera looking outside, 61 00:03:38,290 --> 00:03:44,292 and is able to brake and accelerate when needed. 62 00:03:44,292 --> 00:03:49,252 [AUDIO OUT] 63 00:04:49,380 --> 00:04:52,010 There have been, there are, and there 64 00:04:52,010 --> 00:04:54,660 will be a lot of significant advances in AI. 65 00:04:54,660 --> 00:04:58,590 I think it's a golden age for intelligent applications. 66 00:04:58,590 --> 00:05:00,660 You know, if people want to make a lot of money 67 00:05:00,660 --> 00:05:04,020 with useful things, that's the time. 68 00:05:04,020 --> 00:05:07,320 But this is kind of engineering. 69 00:05:07,320 --> 00:05:10,770 Interesting one, but engineering. 70 00:05:10,770 --> 00:05:15,660 And we are still very far from understanding how people can 71 00:05:15,660 --> 00:05:18,040 answer questions about images. 72 00:05:18,040 --> 00:05:26,250 This is one of the main focus in the center, really. 73 00:05:26,250 --> 00:05:29,070 How does your brain answer simple questions 74 00:05:29,070 --> 00:05:31,230 about this image? 75 00:05:31,230 --> 00:05:32,890 About what is there? 76 00:05:32,890 --> 00:05:34,680 And what is this? 77 00:05:34,680 --> 00:05:35,850 Who is this person? 78 00:05:38,400 --> 00:05:40,860 What is she doing? 79 00:05:40,860 --> 00:05:43,320 What is she thinking? 80 00:05:43,320 --> 00:05:47,100 Please tell me a story about this, what's going on? 81 00:05:47,100 --> 00:05:49,600 [INAUDIBLE] 82 00:05:52,701 --> 00:05:57,030 And we would like to know to have a system that does that. 83 00:05:57,030 --> 00:06:02,070 But also, to know how our brain does it. 84 00:06:02,070 --> 00:06:04,290 So that's the science part. 85 00:06:04,290 --> 00:06:09,620 It's not enough to pass the Turing Test. 86 00:06:09,620 --> 00:06:11,820 In this case, to have a system that does it. 87 00:06:11,820 --> 00:06:15,480 We want to have a system that does it in the same way 88 00:06:15,480 --> 00:06:17,300 as our brain does it. 89 00:06:17,300 --> 00:06:23,160 And we want to compare your model, our system, 90 00:06:23,160 --> 00:06:28,440 with measurements on the brain of people, or monkeys, also 91 00:06:28,440 --> 00:06:31,420 during the same task. 92 00:06:31,420 --> 00:06:37,890 So that's what we call Turing plus, plus questions. 93 00:06:37,890 --> 00:06:40,650 And part of the rationale about it 94 00:06:40,650 --> 00:06:43,680 is, this is kind of a more philosophical discussion. 95 00:06:43,680 --> 00:06:45,330 I personally think that it's very 96 00:06:45,330 --> 00:06:49,440 difficult to have a definition of intelligence, in general. 97 00:06:49,440 --> 00:06:53,210 There are many different forms of intelligence. 98 00:06:53,210 --> 00:06:57,300 What we can ask is questions about, 99 00:06:57,300 --> 00:06:59,490 what is human intelligence? 100 00:06:59,490 --> 00:07:02,310 Because we can study that. 101 00:07:02,310 --> 00:07:02,810 Right. 102 00:07:06,280 --> 00:07:10,270 You know, it is, I don't know, the ENIAC computers 103 00:07:10,270 --> 00:07:14,510 in the '50, more or less intelligent than a person. 104 00:07:14,510 --> 00:07:17,450 You know, it can do things a person cannot do. 105 00:07:17,450 --> 00:07:18,600 And so on. 106 00:07:18,600 --> 00:07:23,560 There are certain things ants or bees do, are pretty amazing. 107 00:07:23,560 --> 00:07:24,700 Is this intelligence? 108 00:07:24,700 --> 00:07:27,870 Yeah, in a certain sense is. 109 00:07:27,870 --> 00:07:32,440 So I think, in terms of a well-defined question, 110 00:07:32,440 --> 00:07:36,628 the real question is about human intelligence. 111 00:07:36,628 --> 00:07:40,900 And so that's what, from the scientific part, 112 00:07:40,900 --> 00:07:42,400 we are focused on. 113 00:07:42,400 --> 00:07:48,190 And would like to be able to answer how 114 00:07:48,190 --> 00:07:51,310 people do understand images. 115 00:07:51,310 --> 00:07:52,600 We start with vision. 116 00:07:52,600 --> 00:07:54,790 We are not limited, eventually, to vision. 117 00:07:54,790 --> 00:07:57,400 But in the first five years of the center, 118 00:07:57,400 --> 00:07:59,406 that's the main focus. 119 00:07:59,406 --> 00:08:02,110 And answer the question about images. 120 00:08:02,110 --> 00:08:08,500 And we want to understand how the answers are produced 121 00:08:08,500 --> 00:08:12,580 by our brain at the computational, psychophysical, 122 00:08:12,580 --> 00:08:15,240 and neural level. 123 00:08:15,240 --> 00:08:17,920 It's ambitious. 124 00:08:17,920 --> 00:08:21,040 And I think there are probably, in terms 125 00:08:21,040 --> 00:08:24,500 of having all these different levels, levels 126 00:08:24,500 --> 00:08:35,200 of really understanding from the what, where, the neuroscience, 127 00:08:35,200 --> 00:08:36,669 to the behavior. 128 00:08:39,250 --> 00:08:41,950 We are not yet at the point in which 129 00:08:41,950 --> 00:08:43,710 we can answer all those kind of questions 130 00:08:43,710 --> 00:08:45,190 at all these different levels. 131 00:08:45,190 --> 00:08:47,080 But some, we are. 132 00:08:47,080 --> 00:08:50,150 One example is, who is there? 133 00:08:50,150 --> 00:08:53,380 It's essentially face recognition. 134 00:08:53,380 --> 00:08:56,830 And this is an interesting problem. 135 00:08:56,830 --> 00:09:02,380 Because we know from work, originally in the monkeys, 136 00:09:02,380 --> 00:09:06,640 and then with fMRI in humans. 137 00:09:06,640 --> 00:09:09,700 Shown here, parts of the brains of cortex, 138 00:09:09,700 --> 00:09:13,210 which are involved in face recognition and face 139 00:09:13,210 --> 00:09:14,440 perception. 140 00:09:14,440 --> 00:09:19,870 And then, it's possible to identify analog regions 141 00:09:19,870 --> 00:09:21,430 in the monkey. 142 00:09:21,430 --> 00:09:29,830 And record from the different patches in the monkeys, 143 00:09:29,830 --> 00:09:35,590 each one probably around 100,000 neurons, maybe 200,000 or so. 144 00:09:35,590 --> 00:09:39,240 And look at their properties when the monkeys 145 00:09:39,240 --> 00:09:41,950 is looking at the face. 146 00:09:41,950 --> 00:09:45,270 And make models of what's going on. 147 00:09:45,270 --> 00:09:47,510 And, of course, we want these models 148 00:09:47,510 --> 00:09:54,550 to respect the neural data, ideally the MRI data. 149 00:09:54,550 --> 00:10:00,010 And do the job of recognizing faces as well as human do. 150 00:10:00,010 --> 00:10:03,520 So we are getting there. 151 00:10:03,520 --> 00:10:06,080 I'm not saying we have the answers, 152 00:10:06,080 --> 00:10:10,880 but we have at least models that can be tested 153 00:10:10,880 --> 00:10:12,760 at all these different levels. 154 00:10:12,760 --> 00:10:15,520 So that's kind of the ideal situation, 155 00:10:15,520 --> 00:10:18,800 from the point of view of what we want to do in the center. 156 00:10:18,800 --> 00:10:20,710 Now as I said that, not all problems 157 00:10:20,710 --> 00:10:24,040 are mature at this level. 158 00:10:24,040 --> 00:10:26,780 There are certain like telling a story. 159 00:10:26,780 --> 00:10:28,060 We don't know exactly. 160 00:10:28,060 --> 00:10:31,330 We cannot record yet from neurons in the monkey, 161 00:10:31,330 --> 00:10:33,610 when the monkey is telling a story. 162 00:10:33,610 --> 00:10:37,180 Because the monkey has not been able to tell its story, right. 163 00:10:37,180 --> 00:10:41,770 And so there are other questions that are not 164 00:10:41,770 --> 00:10:44,210 as advanced as this one. 165 00:10:44,210 --> 00:10:49,960 But other type of studies can be done on them, should be done. 166 00:10:49,960 --> 00:10:53,880 And this is what we'll hear about.