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Decision Frameworks · Card 1
Reversibility Filter
Some doors swing both ways.Some only open once.
- Two-way door
- One-way door
- Try a new SIP amount
- A loan on your house to invest
Before deciding, ask whether this is a two-way door you can walk back through, or a one-way door you can't; and match your caution to the answer.
Two-Way Door
Reversible; walk it back
One-Way Door
Not reversible; decide with care
In Practice
Trying a new SIP amount for a month is a two-way door; reversible, low-stakes to test. Taking a loan against your house to invest is a one-way door; treat it that way.
Generic Example
Trying a new restaurant is a two-way door. Signing a two-year lease is a one-way door.
Ask yourself
If this goes wrong, can I actually walk it back; or am I stuck?
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