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DEEP DIVE: What Can We Add? What Can We Take Away?

October 6, 2025

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  • Humans possess an 'additive solution bias,' making them instinctively favor adding elements to solve problems rather than considering subtraction as a more effective alternative. 
  • The tendency to favor additive solutions is amplified when problems are perceived as larger, more complex, or more stressful, such as in difficult parenting dilemmas. 
  • In parenting, recognizing the 'additive solution bias' allows caregivers to pause and intentionally consider subtractive solutions—like removing commitments or sensory inputs—which can sometimes be the most elegant fix. 

Segments

Introducing Additive Solution Bias
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(00:01:36)
  • Key Takeaway: The human tendency when solving problems is to favor adding elements over subtracting them, a cognitive bias known as additive solution bias.
  • Summary: The episode introduces the ‘additive solution bias,’ which describes the human default of favoring adding things rather than taking things away to solve a problem. This bias is illustrated by the traditional method of teaching children to ride bikes using training wheels (adding) instead of balance bikes (subtracting pedals). This cognitive tendency is often overlooked, even when subtraction might be the more effective solution.
Scientific Proof of Subtraction Overlook
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(00:05:38)
  • Key Takeaway: Studies confirm that people systematically overlook subtractive changes, often adding elements to achieve symmetry or solve problems when removal is simpler.
  • Summary: Research by Leidy Klotz demonstrated this bias by showing participants overwhelmingly added squares to asymmetrical patterns rather than subtracting three to achieve symmetry. Furthermore, an analysis of university proposals revealed that only 11% involved elimination, while 89% proposed adding new elements, confirming this bias extends to institutional problem-solving.
Biological and Cultural Drivers of Addition
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(00:08:46)
  • Key Takeaway: The brain’s drive to always seek ‘more’ is a biological imperative rooted in historical scarcity, which clashes with modern abundance.
  • Summary: The bias may stem from a biological imperative developed during times of scarcity, where solutions required acquiring more resources like food and safety. Additionally, adding solutions often appears more virtuous and earns implicit social approval, contrasting with the lack of approbation received for doing less.
Capitalism and Parenting Overload
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(00:10:58)
  • Key Takeaway: Capitalism and consumer culture constantly fuel the additive bias by marketing new products as solutions to problems parents may not even realize they have.
  • Summary: Media and capitalism promote additive solutions, exemplified by ‘As Seen on TV’ products that solve non-existent problems, like the Slanket. In parenting, this translates into pressure to buy specific products or services (like tutoring or specialized food) to prove one is doing everything possible for their children.
Stress Magnifies Additive Bias
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(00:18:36)
  • Key Takeaway: The more stressed or significant a problem feels, the more likely a parent is to default to adding complexity rather than simplifying through subtraction.
  • Summary: Studies indicate that increased cognitive burden or stress—such as a child not reading at grade level—makes individuals more likely to rely on additive bias. This often leads to increased complexity, similar to Braess’s paradox where adding roads can slow traffic, or in parenting, adding layers of intervention instead of simplifying the situation.
Decorative Baskets and Sunk Costs
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(00:21:41)
  • Key Takeaway: The ‘decorative basket bias’ illustrates how the desire to organize clutter often leads to buying more organizational tools instead of decluttering the excess items.
  • Summary: The ‘decorative basket bias’ describes the impulse to buy organizational systems when the real solution is subtraction (decluttering). Holding onto items due to sunk cost fallacy—feeling obligated to keep things because money or time was already invested—prevents necessary removal, turning clutter into persistent garbage within the home.
Applying Subtractive Thinking in Parenting
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(00:40:48)
  • Key Takeaway: Subtractive solutions can involve reducing sensory inputs, commitments, or intervening less in situations like sibling rivalry or infant sleep issues.
  • Summary: When facing chaotic mornings or difficult behavior, subtracting sensory inputs like music or dimming lights can help, as people have different tolerance set points for stimulation. For instance, an earlier bedtime (subtraction of late hours) can solve sleep issues better than adding a new gadget, and stepping back from intervening in sibling fights is a valid subtractive strategy.