Coaching practices for Conjunction Planning Error
Describe almost anything you are working through and IX Coach finds the practices whose real-world fit is closest. For Conjunction Planning Error, these are the strongest matches in the current practice library.
Does this sound like the set of challenges you might be facing?
- My plan only works if a whole chain of things all go right
- I’m betting on "this will happen and then that will follow," and the link between them feels airtight to me
- When two things fit together neatly in my head, I treat the whole package as more likely than either piece alone
- My plans hold up fine until something throws them off
- I’ve lived inside this scenario so long that every piece feels obvious to me
Practices that may help
- Audit plans for scenario inflation
Before committing to a plan that depends on multiple things going right, count the dependencies.
The Conjunction Fallacy — When "More Details" Feels More Likely - Red-team joint scenarios before betting on them
Before acting on a conjunction ("X will happen AND Y will follow"), assign a skeptic to attack the "and."
The Conjunction Fallacy — When "More Details" Feels More Likely - Test each component probability separately
Before judging a joint claim, estimate each element on its own, then check whether the conjunction is lower.
The Conjunction Fallacy — When "More Details" Feels More Likely - The Conjunction Fallacy — When "More Details" Feels More Likely
The conjunction fallacy is the well-replicated tendency to judge a specific combination of events as more probable than one of its components alone — made famous by Kahneman and Tversky’s Linda problem. It happens because vivid, representative details hijack probability judgment, and the fix is to reason about base rates rather than narrative fit. - Plan for obstacles with coping plans
Anticipate the specific obstacles most likely to block your plan and pre-decide your response to each.
Action Planning - The Planning Fallacy — Why Your Estimates Are Always Wrong
The planning fallacy is the well-replicated tendency to underestimate completion times even when you know your past projects ran late. The fix is not to "try harder" — it is to switch from imagining the ideal future scenario to consulting your own base-rate history and similar projects. - Consult an outside observer to counteract narrative pull
Describe the scenario to someone who doesn’t share your narrative context and listen to their probability estimate.
The Conjunction Fallacy — When "More Details" Feels More Likely - Explicitly distinguish coherence from probability
A story can be internally consistent and still be rare — learn to separate "makes sense" from "likely."
The Conjunction Fallacy — When "More Details" Feels More Likely - Specify the when and where for every goal action
"I will do [behavior] at [time] in [location]" — specificity creates an automatic trigger.
If–Then Planning, Made Practical - Run a premortem before committing
Imagine the project has already failed and work backwards to find why.
The Planning Fallacy — Why Your Estimates Are Always Wrong
Related concerns
- Conjunction Error Planning
Before committing to a plan that depends on multiple things going right, count the dependencies.
Audit plans for scenario inflation
- Conjunction Error Probability
Before judging a joint claim, estimate each element on its own, then check whether the conjunction is lower.
Test each component probability separately
- Conjunction Fallacy Practice
Before judging a joint claim, estimate each element on its own, then check whether the conjunction is lower.
- The Conjunction Fallacy When More Details Feels More Likely After A Setback
The conjunction fallacy is the well-replicated tendency to judge a specific combination of events as more probable than one of its components alone — made famous by Kahneman and Tversky’s Linda problem. It happens because vivid, representative details hijack probability judgment, and the fix is to reason about base rates rather than narrative fit.
- The Conjunction Fallacy When More Details Feels More Likely At Work
The conjunction fallacy is the well-replicated tendency to judge a specific combination of events as more probable than one of its components alone — made famous by Kahneman and Tversky’s Linda problem. It happens because vivid, representative details hijack probability judgment, and the fix is to reason about base rates rather than narrative fit.
- When Conjunction Fallacy Decompose Conjunctions
Before judging a joint claim, estimate each element on its own, then check whether the conjunction is lower.
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