Lior Pachter Profile picture
Dec 22 9 tweets 4 min read
You have to hand it to Lex Fridman. His grift is not an amateur job. Take his Twitter photo. A professor standing in front of a blackboard with some math. Right?
This photo (see RHS of image below) is from what he calls his "MIT course" on Deep Learning for Self-Driving Cars. Sounds like good stuff. CS, math, self driving cars. #broheaven. So what is the problem? He is standing in front of the blackboard.
Well first of all, this was an MIT IAP class. IAP is a short period in January when students get to take fun classes on various topic that can be taught by anyone (many by students). I once sat in on a brain dissection. You can learn how to count cards. web.mit.edu/willma/www/mit…
The blackboard Lex is standing in front of has basic calculus left over from an actual real MIT calculus class. It has nothing to do with what he is "teaching". The stuff he is presenting is a joke. You can listen in to some of his rubbish here:
He clearly doesn't know what he's talking about. This explanation of L1 and L2 is 😭 He is standing in front of the formula 1-cos(2θ). I doubt he could tell you what the cosine of an angle is.

I watched all this crap so you don't have to.
I'm not the first to figure this out... news.ycombinator.com/item?id=272553…
Everybody knows.
Lex doesn't quite lie, but obviously he is far from telling the whole truth. His "research position" is a whole other bunch of bull (for another time). And he uses this MIT mirage to great advantage, creating the perception that he is effectively a professor there.
By now people just take it for granted that he is an MIT prof. And he nurtures that myth. As I said, gotta hand it to him.
Full disclosure: Lex blocked me after I questioned why (with very few exceptions) he interviews only men.

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More from @lpachter

Dec 20
One of the Christmas stories that's almost completely forgotten is that of Bogdanovka. Starting on Dec. 21, 1941, tens of thousands of Jews were murdered in a camp in what is present day Ukraine by Romanian soldiers, ethnic Germans & Ukrainian police. 1/5

timesofisrael.com/romanias-homeg…
Large groups of hundreds of Jews were marched to a ravine in a forest and shot. Those who couldn't manage the march were murdered by the thousands in pigsties in which they were locked that were set on fire. Many others froze to death. degruyter.com/document/doi/1… 2/5
A poignant detail: the murderers took a break to celebrate Christmas, but resumed three days later, having killed ~40,000 people in time for New Years celebrations. 3/5
Read 5 tweets
Dec 19
So I got an email from a place called RayTech Group offering me $10,000 per month to write recommendation letters for their students who "need apply universities" with the stipulation that "the content of the recommendation letters can be further discussed" with me.
Their website (raytech.group) says that they achieve "students' comprehensive 'background development'" and "enhance the competitiveness of students at school age. As soon as possible to achieve the Offer from famous universities and enterprises."
This place has a website raytech.group/our.aspx?Class…
with photos of various people affiliated with @Stanford university. E.g. gsb.stanford.edu/faculty-resear…
Read 13 tweets
Dec 4
In a new preprint w/@kreldjarn, @DelaneyKSull, @GuillaumOleSan & @pmelsted we address a shortcoming in current approaches to quantifying single-nucleus RNA-seq: biorxiv.org/content/10.110…
tl;dr care has to be taken in quantifying nascent vs. mature transcripts. #snRNAseq #scRNAseq🧵
First, note that single-cell RNA-seq data provides some quantification not only of processed (mature) messenger RNAs, but also of nascent molecules. That observation by @GioeleLaManno, @slinnarsson and colleagues underlies RNA velocity. But what about single-nucleus RNA-seq? 2/
Similarly to #scRNAseq, #snRNAseq data has reads derived from both nascent and mature transcripts. However, perhaps due to intuition that #snRNAseq is all nascent, current approach to quantification yield a single count matrix based on all reads mapping to every gene locus. 3/
Read 16 tweets
Nov 18
The "genius" @elonmusk was a year ahead of me @PtaBoysHigh. Every year they gave awards to those "worthy of praise" (digni laude). Perhaps it's not a big surprise that Musk was never deemed "worthy of praise".
Which is fine, of course. Awards like this are rubbish anyway. But friendships aren't, and the people I miss from school, and there are many... are not Musk (in this photo he is front row left).
Nowadays @elonmusk likes to cultivate his genius myth... here his mom gives him an assist. businesstoday.in/latest/trends/…
Read 5 tweets
Nov 11
Why are they selling poppies, Mummy?
Selling poppies in town today.
The poppies, child, are flowers of love.
For the men who marched away.
But why have they chosen a poppy, Mummy?
Why not a beautiful rose?
Because my child, men fought and died
In the fields where the poppies grow.
But why are the poppies so red, Mummy?
Why are the poppies so red?
Red is the colour of blood, my child.
The blood that our soldiers shed.
Read 6 tweets
Oct 29
This is rubbish. Shame on @sapinker for spreading this misogyny. A 🧵...
Let's start with the article he links to. It begins w/ "Women are now 60 percent of college graduates, men a mere 40 percent" describing this as "the fading male presence". Bollocks. The percentage of males who have completed four years of college has soared: 6% to 37% in 80 yrs.
How does that relate to the 60-40 differential between current graduates? Misogynists try to scare with truncated axes as shown below. They will say that the plot above is cumulative over time, i.e. it looks at the whole population, not graduates today. Well, let's take a look..
Read 19 tweets

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