superdecipher
Curious0 XP
Mental models

Inversion

Work out how to fail, then avoid doing exactly that.

What would guarantee failure?

Turn the problem upside down

Ask “how do I succeed?” and you tend to get vague answers: work hard, be smart, stay focused. Ask “how would I make sure this fails?” and the answers come fast and specific.

That’s inversion: think about the opposite of what you want, list everything that would cause it, then avoid those things. The 19th-century mathematician Carl Jacobi advised his students to “invert, always invert”. Investor Charlie Munger joked that he only wanted to know where he would die, so he would never go there.

Flip all three cards and invert the failures

Have a great first week at a new job

Forward advice:

  • Be proactive
  • Make a good impression
  • Learn quickly

To make sure it fails…

  • Arrive late and leave earlyArrive 10 minutes early all week
  • Never ask questions, guess insteadKeep a running list of questions and ask daily
  • Criticise how things are done on day twoSpend week one listening before suggesting changes
  • Forget everyone’s namesWrite down names and roles after each meeting

Keep a houseplant alive

Forward advice:

  • Care for it well
  • Give it what it needs

To make sure it fails…

  • Water it every dayWater only when the top soil is dry
  • Put it in a dark cornerKeep it near a bright window
  • Leave it in a pot with no drainage holeUse a pot with a drainage hole
  • Forget about it for a monthSet a weekly reminder to check it

Run a useful team meeting

Forward advice:

  • Be efficient
  • Keep people engaged

To make sure it fails…

  • Have no agendaShare a three-line agenda beforehand
  • Invite everyone just in caseInvite only people who must decide or act
  • Let one person talk the whole timeGive each person a turn
  • End without deciding who does whatClose by naming owners and dates

Win more by losing less

In amateur tennis, most points aren’t won by brilliant shots. They are lost by mistakes. Imagine a match between two equal club players. Which would help you more: hitting more winners, or making fewer errors?

0%
0%

Model: each shot has a 15% chance of an error and a 3% chance of an outright winner, roughly typical for club players.

Try both sliders

Why inversion works

Failure is concrete

We can picture mistakes far more vividly than success, so the list comes easily and in detail.

Avoiding errors compounds

Staying out of trouble every day often beats occasional brilliance.

It exposes blind spots

Looking from the opposite side reveals risks that optimism hides.