digest
Short Summary
Main recommendation: When facing a problem, pause and consider a subtractive solution (removing something) before defaulting to an additive one (adding something), because humans have a natural bias toward adding. The video cites studies showing that most people add to puzzles and problems even when removing is equally valid or more efficient, and it encourages applying that check to everyday decisions such as consumption and clutter.
Key Points
- Lego test: a single piece could be removed to support the overhang at no extra cost, while about 59% of people chose to add a block instead.
- Symmetry puzzle and mini golf: about 79% of people added to the mini golf course rather than taking something away, and removing green squares could reach symmetry as easily as adding.
- University survey: only 11% of responses from university presidents proposed removing an existing regulation, practice, or program, which the video links to extra red tape and unnecessary positions.
- The bias is a heuristic (a mental shortcut); when researchers explicitly told people they could add or subtract, the share of subtractive solutions rose, and cognitive load (such as turning the head clockwise during the puzzle) increased additive choices.
- Possible reasons for the bias: subtraction seems less creative or less credited, removing others' decisions has social or political costs, people assume existing parts are there for a reason, and the sunk-cost bias makes people continue existing investments.
Details Worth Noting
- Concrete instructions: When solving a problem, first ask whether something can be removed or simplified, not only what can be added. Compare the additive option against the subtractive one (for example, check whether removing a single piece fixes a structure before buying or adding new parts). In the symmetry puzzle, aim for the fewest changes possible, including switching or removing squares rather than adding new ones. Apply the same check to decisions like decluttering (paring down or discarding unused items before buying organizers), editing writing by cutting words rather than adding them, and reviewing meetings, emails, or commitments before adding more. For the Lego-style challenge, the video's answer is to remove the single piece shown, not add support blocks.
- The video says the subtractive bias can be overcome with extra cognitive effort, so deliberately pausing to evaluate subtraction is the suggested method.
- The speaker mentions interviewing one of the lead researchers on the channel's podcast, whose book is called "Subtract," for more strategies on the "science of less."
- The video frames cultural sayings like "less is more" and figures like Marie Kondo as reminders that counter the natural tendency to add.
- The speaker links the same bias to consumption, noting that economic growth expectations and environmental costs make using less worth considering alongside additive solutions like solar and wind.
Bottom Line
The video's core point is that humans default to adding, but removing is often the faster, cheaper, and more effective fix, so checking the subtractive option first is worth the effort.
