So, earlier today I posted a wrong tweet, which I then deleted. Thankfully, it only stayed on for a few minutes.

But I think it's important that I explain what I got wrong and why, for some could benefit too.

(thread)
2/ I was commenting on this chart.

I correctly pointed out that the increase is relative. For example, it doesn't mean that more young people died than old.

However, I also wrongly added that the chart showed the increase in COVID risk for the young.

3/ I didn't consider that young adults tend to die of causes such as cancer that got impacted negatively by the lockdown (no cures)

The chart being about all-mortality, & the absolute number of young adults deaths being fairly low, the *direct* contribution of COVID might be low
4/ Thanks to @TaylorPearsonMe and Bruno Morgado for swiftly pointing this out to me.
5/ That said, I believe it's important to distinguish between "young people are less at risk" and "this means that the young can expose themselves to the virus" because, of course, the more they do the latter, the less the former becomes valid.
6/ As a side remark, I recall about 3 tweets in which I made a major mistake and retracted shortly thereafter. For all of them, I was at the side of the road in my car.

Note to self: don't tweet while multitasking.
7/ Some asked why the lines drop in the right part of the chart.

I believe it represents delay in reporting and should therefore be discarded as non-significant. I do not know about the US, but in Europe all-causes-mortality data take 1-3 months to show up complete.

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More from @DellAnnaLuca

17 Oct
In yesterday's tweet, I was critical of scientific institutions endorsing specific parties.

Here is an example of why.

There is no such thing as "the scientific party" or "the anti-scientific one" – not if by science we intend real science, rather than a politicized consensus.
IMHO there's too much focus on who governs the political structure and too little attention to whether:
- The structure is good
- It provides good incentives
- It filters bad members
- The downside of bad decisions is capped
- It provides longevity to the common good or to itself
(I don't live in the US and this was not intended to be a reflection on the US; I merely stumbled on the quoted thread and it made me think. Many other countries will find that, if they remove the words and look at the actions, "scientific parties" aren't that scientific at all.)
Read 4 tweets
16 Oct
Why is it important to care about small HSE violations in manufacturing companies?
Shouldn't we only care about injuries & deaths?

Only if we want the company to fail and workers to die.

(thread)
2/ Yesterday, I pointed out that a famous automotive company has a lot of OSHA violations. The most common response I got is that those relate to meaningless violations.

Perhaps. But only in a theoretical ideal world, meaningless violations are unrelated to incidents.
3/ In the real world, incidents *approximately* follow a pyramid as the below one (image from my book gum.co/opexbook).

The more "meaningless violations" a company has, the more a big incident is waiting to happen.
Read 7 tweets
3 Oct
I agree. Plenty of exceptions (that might be over-represented in my Twitter audience) but for most businesses, the below holds.

(Thread with motivations, 1/6)
2/ One reason is that hiring inside is Lindier than hiring remote – not from a historical perspective, but (see below) for the range of circumstances that must be true and must hold true over time for remote hiring to be effective vs in-house.

3/ (Yes, there are good examples of hiring remote, but I suspect there's a lot of survivorship bias in there. Also, it's possible that you hire a better-than-internal remote talent and still lose the long-term game due to externalities such as morale hits or cultural problems.)
Read 7 tweets
1 Oct
WHY DO WE ENGAGE IN SELF-HARM?

The reason is that we do not seek survival, but what feels like survival.

Any action that produces the same neurochemicals that we associate to pro-survival actions produces changes in our brain that make us desire it.

For example,

(thread, 1/N)
2/ For example, sugar gives us energy, and we need energy to survive.

When we eat sugar, our brain feels like we are increasing our chances of survival, REGARDLESS OF WHETHER IT IS THE CASE.

When we slowly kill ourselves through metabolic diseases, it still feels like survival.
3/ Our ancestors whose genes made them produce behavioral-reinforcing chemicals when they did something that increased their survival also tended to survive more.

Hence those genes spread. We ended up desiring repeating the actions that produced those neurochemicals.
Read 6 tweets
29 Sep
Natural selection is inevitable, but we can choose whether it acts on us (bad) or within us (good).

Up to a point, of course, but imagine a company:

If uncompetitive, the market's meritocracy bankrupts it

But the company can protect itself by letting meritocracy work inside it
2/ Natural Selection acts on any entity and within any population.

The monolithic only suffers from NS, whereas populations suffer but also benefit from it.

In fact, the monolithic is fragile whereas populations can be antifragile.

We can apply this insight by realizing that…
3/ if we consider ourselves a population (of habits & beliefs), we can let natural selection remove those that are bad for us, making us stronger. It acts within us

Instead if we consider ourselves a monolithic identity, we cannot grow. We become the victims of natural selection
Read 4 tweets
24 Sep
ON ALTERNATION

Often, the best approach is not A or B, but an alternation of A and B.

For example, action and reflection. Or study and application.

It’s not about balance, but about making hypotheses and verifying them.

Thread (1/N)
For example, the human cortex 🧠 is based on the principle of *alternating* two operations: expansion and compression of information.

Only one operation would not be able to achieve any meaningful result.

Instead,
3/ Instead, the cortex alternates these two steps:
- It expands information across all possible hypotheses, relevant or irrelevant.
- It compresses information, by eliminating the hypotheses that are proved wrong by sensorial stimuli and/or experience.

This “brainstorm” is 💯
Read 11 tweets

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