George Rebane
Judea Pearl, Professor of Computer Sciences UCLA, received the A.M. Turing Award last night at the awards banquet of the Association of Computing Machinery at the Palace Hotel, San Francisco. He now joins the forty-three previous laureates of the ‘Nobel prize of computing’, of whom twenty-five were in attendance to honor him.
Jo Ann and I joined the gala celebration as guests of the awardee, and sat with family and friends, most of whom we have known for decades. (I am a lifelong member of the ACM.) The awards banquet also honored other contributors to the field and culminated in the Turing Award presentation. Here is ACM’s official, yet still modest, recounting of Judea’s accomplishments.
The Pearls became family friends soon after Judea Pearl collaborated on a project with a ‘black studies’ company I was running in the 1970s. Judea’s wife Ruth (an accomplished software engineer in her own right) is a consummate hostess. Jo Ann also had (still has) a reputation for putting on mean soirees that, with the passing hours, devolved into impromptu performances ranging from poetry recitations, through heated debates on various arcane and absorbing topics, to planned revivals of long ago salons of the Englightment.
We were often at each other’s house for such dinners, parties, and special noodling sessions. These always included music that had us singing with guitars and keyboard for accompaniment. Judea is an accomplished guitar player, keyboardist, and has a great singing voice. He’s also a world class choral conductor and has performed numerous times at the LA Music Center. (I was the less practiced one on both instruments, making up in volume for what I lacked in technique.)
A couple of shared memories from a rich catalog. For Ruth’s birthday one year Judea invited us and another couple to a small westside bistro in LA. We knew that something special was going to happen because Judea brought his guitar; but what could that be since we were eating in a restaurant? Not a problem, soon the main course was finished, and after dinner drinks were in hand. The lights were low and the atmosphere was perfect as Judea reached behind his chair for his trusty guitar and putting a foot on his chair, he launched into a medley of love songs to his bride of many years.
The other patrons in the restaurant were enthralled along with those at our table. I recall Judea ending his special gift to Ruth (and the rest of us) with a rendition of a soulful Spanish adagio for solo trumpet and guitar from a piece I could not place. It was a night to remember, as Judea kissed Ruth to the applause of the entire restaurant. (Solo trumpet? Did I fail to mention that Judea also has a unique gift, the ability to purse his lips, puff his cheeks, and perfectly simulate the sound of a virtuoso trumpet?)
Another memory is when I got a call late one afternoon from Judea saying that Ed Feigenbaum was in town and could drop by for some dinner and talk; would I care to join them? (The techie reader will recognize Feigenbaum as a renown giant of AI, ‘father of expert systems’, and Turing laureate who taught for years at Stanford - now professor emeritus.) Long story short. After one of Ruth’s ‘oh it’s nothing’ fabulous meals, the three of us retired to the patio and spent the next four (five?) hours talking about the state of machine intelligence, who was doing what, and possible directions the science would take and its impact on society. At the time Judea had already published his landmark 1986 paper and was working on his 1988 book on Bayes nets (I was one of Judea’s doctoral students doing research in Bayes learning). It was clear that the torch would soon be passed from Feigenbaum’s expert systems to Pearl’s Bayes nets (with causality soon making its early murmurs). Truly another memorable night.
So that was the basis for all the fuss this weekend at the Rebane household. Yesterday morning we dropped off our puppy with the Steeles, and headed through a hot and crowded central valley to San Francisco. Judea and I were able to spend some quality time together before the band started playing. (The picture with the other white haired professor catches a debate on who has known Judea the longest - I foolishly thought c'est moi. I came in a distant second to the good professor who has known Judea since they were playmates on an Israeli kibbutz eons ago while the Brits still ran Palestine.)
Jo Ann and Ruth picked up where they left off (top picture). Ruth also sits on the board of the Daniel Pearl Foundation which is dedicated in memory of their son and has as its mission statement –
The Daniel Pearl Foundation has been formed by Danny's family and friends to continue Danny's mission and to address the root causes of this tragedy, in the spirit, style, and principles that shaped Danny's work and character. These principles include uncompromised objectivity and integrity; insightful and unconventional perspective; tolerance and respect for people of all cultures; unshaken belief in the effectiveness of education and communication; and the love of music, humor, and friendship.
(Full disclosure: Jo Ann and I are ongoing supporters of the foundation, especially its work in bringing greater mutual understanding between Islamic and western cultures.)
An apology for all occasions
George Rebane
[In my long working career I was privileged and very lucky to have worked with and under some truly remarkable and very smart people. One of these was an older systems engineer extraordinaire and a complete gentleman by the name of Skip Case. I was technically his peer, but I never considered myself as such. In a number of different ways Skip taught all of us who worked with him. Those who also bothered to learn, benefitted from his wisdom.
Skip died a few years back, a little before I started RR, and was then only occasionally posting on the SESF website. When I heard the news, it hit me that over the decades I and several others had been profitably using a phrase that he taught us years ago. To remember Skip, I wrote the following vignette and posted it on the SESF website. My most recent use of the phrase in a comment recalled the vignette, and I retrieved it to share with RR readers. You may also find it useful some day, especially in the heated discussions of complex issues we cover here.]
Skip Case RIP
George Rebane – 21 May 2007
The conference room was crowded with the company’s elite engineering talent and top management for a very important system design review meeting. The decision taken today would impact the company’s standing and future role as the nation’s leading nuclear submarine combat systems developer and manufacturer. In 1968 as a young hotshot engineer I was privileged to be included in that tense gathering of greats in a very secretive industry critical to the country’s well-being, yet almost completely and purposefully unknown to the outside world. On board every operational fleet ballistic missile and attack submarine of our Navy, our company’s systems were the ones that would likely fire the opening salvos of WW3.
One of the company’s senior project engineers had just completed a presentation of an important design concept on which the effectiveness of the new system would hinge. He was a man in his late forties of small yet lithe stature and thinning neatly combed hair. What especially distinguished Skip’s presence was his gaze – he had the most focused and level gaze which when turned on you established an intellectual connection that would bind like a taught rope. Using the fewest words needed, Skip always spoke precisely and with a calm urgency that made the listener want to lean forward in his chair so as not to miss a single pearl.
Engineering, as a demanding technical profession, is often a ruthless forum in which mistakes and errors are pounced upon by peers for ego gratification, reputation enhancement, and generally counting coup. Such critiques are most often spontaneous but sometimes, especially when corporate management will be present, they are planned ambushes of great sophistication. That morning a mid-level division manager with a short career as a practicing engineer rose to deliver a withering critique of the just concluded presentation. It was obviously a long-planned critique that had still been in deep rehearsal while Skip was talking. And it was apparent to us all that he had not understood the very essence of the design approach. As he concluded with a knowing glance to the company’s chief technical officer (Chief Engineer in those days), all eyes turned to Skip.
Remaining seated with hands folded, Skip fixed his attacker in that signature gaze and, with incredible calm and no hint of sarcasm, said,
“I’m sorry, I didn’t say it well enough for you to understand.”
… and paused. As the semantic impact of this simple sentence settled in our minds most of us were astounded. I remember scrambling to record those words in my notebook and I wasn’t alone. The managerial upstart was dumbfounded, he didn’t know on whom those contrite words put blame or shame. He wanted to strike back, but no obvious target had been presented. While his would-be nemesis was so consternated, Skip proceeded to quickly correct the man’s error and the meeting went on to a productive conclusion.
In his wisdom Skip Case settled a potentially contentious and divisive situation with a sentence that allowed everyone to draw their own distinct yet proper meaning of the occasion depending on their position and perspective. All of us left the room with those words in mind. I was fortunate to count Skip as one of my mentors and to sit at his knee during those early years. And since that time I also have learned to apologize when I could not say it well enough for my respondent to understand – but still not as well as Skip.
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