Bayes’ berms and innovative scones

A bit better today, certainly. We topped out at “only” 35, so that helped, but still almost no energy or enthusiasm. Most of this flat is a mess. I was struggling in my four hours of lessons with various boys. The mother of two of the boys insists on me sending her sheets which she prints out and they fill in. This does not work, unless her goal is to make my life five times harder in which case it works perfectly. I can’t see what they’re doing.

Before my lessons I picked some plums in Mehala. One woman asked me if I’ve I’d got permission from her neighbour. They didn’t look like they were on her neighbour’s (or anyone else’s) property – the tree was on what I call a berm after living in NZ for 13 years – and anyway her neighbour didn’t seem particularly interested in them. They were fully ripe; three more days and they’d have had it. I said nothing and left. There were plenty more trees down the road.

I’m now going to scale the steep berm of language once again. About 30 hours ago a luxury yacht named Bayesian sank in a storm in Sicily, probably killing seven on board. The ship’s name comes from Bayesian inference and Bayes’ theorem, some nifty statistical stuff that Thomas Bayes came up with in 1763. In fact there’s a whole load of stuff named after the man. As far as I see it, Bayes theory is basically this: you have a “prior” or “gut feeling” about something probabilistic, then you get new information that may cause you to shift that feeling in one direction or another by a certain amount. For example, I have a coin in my pocket. My “prior” is that it’s fair: both heads and tails have a 50% probability. Then I toss it ten times and get nine heads. That probably won’t convince me to shift my prior much. Nine heads out of ten is rare, but not super rare. But then I keep tossing the coin, and after 100 flips I’ve got 85 heads. Now I’m convinced that I’ve got a seriously skewed coin. Getting that many heads from 100 flips of a fair coin is one in a squillion dillion, give or take. But what is the real probability of getting a head on this particular coin? The more flips you do, the less notice you take of your original prior (50% in this case) and the more weight you put on what you actually see (85% or whatever). Bayes’ theory tells you how much to weight your prior as opposed to your observed information, according to how much information you’ve observed. Anyway, it seems this Bayesian stuff is very lucrative for certain people, including the owner of the yacht, Mike Lynch, who is now presumed dead. He has had major court proceedings against him, and weirdly his co-defendant was killed by a car while running on Saturday. The word Bayesian has all of a sudden entered the mainstream.

I watched a video on the sinking, or tried to – I’m finding it hard to take in new information. I was struck by the Italian journalist they interviewed named Alina Trabbatoni. Her English, which she spoke with a standard English accent, was extraordinary. Better than fluent. You’d never know she wasn’t a native. With one exception: her pronunciation of innovative when describing the yacht’s mast. She said i-NOV-uh-tiv, with second-syllable stress, pronouncing the “nov” bit just like in “novel”. My students have come up with this pronunciation too over the years; it isn’t a rare word. But as far as I’m aware, native speakers never say it this way. Brits (like me) go with IN-uh-vuh-tiv, while Americans say IN-uh-vay-tiv, sometimes even shifting the main stress to the “vay” part. I checked Wiktionary just in case, and it told me that in-NOV-uh-tiv was the default pronunciation for Brits! I don’t believe that for one minute. I checked Youglish, a very handy tool where they play short chunks of popular YouTube videos containing a word that you specify, and nobody, not even the Brits, ever said i-NOV-uh-tiv.

Finally, scone. How do you say it? I rhyme it with gone, just like about half of those surveyed in Cambridgeshire where I grew up. But I think Mum being a New Zealander made it a sure thing that I’d say it that way. I remember Mum’s mother joking one time about the rhymes-with-bone pronunciation, as if it was ridiculously upper-class for NZ. Mum, as well as her mother, often made scones, but I had to laugh at the bit about people’s preferences for putting the jam or the cream on first. Mum’s scones, though delicious, came with margarine. The idea of having either jam or cream with them, let alone both in either order, would have been absurdly decadent.

Three lessons tomorrow, leaving time for packing. Then a seven-hour drive (but I bet it’s more) to Maribor.


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