How to think critically:

(mental models and logical fallacies)

Whenever possible, confirm the "facts."

"Fact-checkers are just fake authorities anointed by the media, according to fact-checkers." — @naval
Authorities can make mistakes.

Don't fall for the "arguments from authority fallacy."

"In science there are no authorities; at most, there are experts." — Carl Sagan
Survival of the fittest argument.

Always think of multiple explanations for an argument.

Then think of tests to disprove each explanation.

Whatever remains has a better chance of being right than simply sticking with the first idea.
Two mental models that fit here:

Occam's Razor: When faced with multiple explanations pick the simpler.

Hanlon's Razor: "Never attribute to malice that which is adequately explained by stupidity." In other words, there can be honest mistakes.
Debate all points of view.

"Be skeptical of the side of a debate that is less willing to try to see the other side’s point of view." — @sama
Be open to disproof.

Unfalsifiable ideas are not worth much in the grand scheme of the universe.

"It’s smart to take help of a pessimist to find blind spots in an idea you feel very confident about. That’s their only good use I've found so far." — @kunalb11
Choose knowledge over ego.

Just because an idea is yours doesn't make it right. Accept that others can and will find faults with it.

"The trick to viewing feedback as a gift is to be more worried about having blind spots than hearing about them." — @JamesClear

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Recently, the @CNIL issued a decision regarding the GDPR compliance of an unknown French adtech company named "Vectaury". It may seem like small fry, but the decision has potential wide-ranging impacts for Google, the IAB framework, and today's adtech. It's thread time! 👇

It's all in French, but if you're up for it you can read:
• Their blog post (lacks the most interesting details):
https://t.co/PHkDcOT1hy
• Their high-level legal decision: https://t.co/hwpiEvjodt
• The full notification: https://t.co/QQB7rfynha

I've read it so you needn't!

Vectaury was collecting geolocation data in order to create profiles (eg. people who often go to this or that type of shop) so as to power ad targeting. They operate through embedded SDKs and ad bidding, making them invisible to users.

The @CNIL notes that profiling based off of geolocation presents particular risks since it reveals people's movements and habits. As risky, the processing requires consent — this will be the heart of their assessment.

Interesting point: they justify the decision in part because of how many people COULD be targeted in this way (rather than how many have — though they note that too). Because it's on a phone, and many have phones, it is considered large-scale processing no matter what.
MASTER THREAD on Short Strangles.

Curated the best tweets from the best traders who are exceptional at managing strangles.

• Positional Strangles
• Intraday Strangles
• Position Sizing
• How to do Adjustments
• Plenty of Examples
• When to avoid
• Exit Criteria

How to sell Strangles in weekly expiry as explained by boss himself. @Mitesh_Engr

• When to sell
• How to do Adjustments
• Exit


Beautiful explanation on positional option selling by @Mitesh_Engr
Sir on how to sell low premium strangles yourself without paying anyone. This is a free mini course in


1st Live example of managing a strangle by Mitesh Sir. @Mitesh_Engr

• Sold Strangles 20% cap used
• Added 20% cap more when in profit
• Booked profitable leg and rolled up
• Kept rolling up profitable leg
• Booked loss in calls
• Sold only


2nd example by @Mitesh_Engr Sir on converting a directional trade into strangles. Option Sellers can use this for consistent profit.

• Identified a reversal and sold puts

• Puts decayed a lot

• When achieved 2% profit through puts then sold