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Lessons

Every short video we publish gets a page here - the video, a written breakdown, and the deck to actually learn it.

Why Prices Keep Rising

inflation is too much money chasing too few goods; not every price rise is greedy companies

Why Prices End In .99

left-digit anchoring; the 9.99 trick exploits how fast the brain reads the first digit

Why Correlation Isn't Cause

confounders and reverse causation; ice cream sales and drownings both rise in summer

Why The Average LIES

mean vs median vs mode; one outlier can drag the mean further from anyone's actual experience

Why Bees Matter More Than Honey

pollination services underpin ~75% of crop species; colony collapse is an economic story not just an insect one

Why Summer Is Hotter

axial tilt changes the angle and hours of sunlight; distance from the sun is not the reason

What Sleep Actually Does

glymphatic clearance and memory consolidation; the brain literally washes itself while you sleep

Why You Shiver When Cold

shivering is involuntary muscle work that converts ATP to heat; brown fat and non-shivering thermogenesis do the rest

Why Salt Melts Ice

freezing point depression; the dissolved ions block the crystal lattice, and why it stops working below -21C

What Metabolism Actually Is

basal metabolic rate and what really varies between people; where the slow metabolism story breaks

Why Cold Is Not A Thing

heat only ever moves one direction; cold is an absence, and why that changes how you dress

Why Moon Phases Are Not Shadows

the Earth shadow misconception vs the geometry of which lit half you can see

Why Antibiotics Do Nothing For Flu

bacteria and viruses are not the same target; how resistance is manufactured

What A Vaccine Actually Teaches

adaptive immunity and memory cells; the vaccine trains, it does not fight for you

Why The Sky Is Blue Not Violet

Rayleigh scattering plus how the eye is tuned; the usual answer is only half of it

Why Saving Notes Is Not Learning

the collector illusion; storage feels like progress while retrieval is what builds knowledge

Why Unfinished Tasks Nag You

open loops occupy working memory; writing it down closes the loop without doing it

Why Your Day Feels Productive

urgency has an alarm and importance does not; the quadrant that quietly gets skipped

Why Work Fills The Time

tasks expand to the time allotted; the deadline as a design tool not a threat

Why Everything Takes Longer

inside view vs outside view; using a reference class instead of imagining the smooth run

Why Starting Small Actually Works

activation energy; consistency builds the identity that intensity cannot

Why Willpower Is The Wrong Tool

cue routine reward; you redesign the cue and the environment, not the amount of effort

The Cost You Never See

every yes is a no to something else; the real price is the best thing you gave up

Why You Fear The Wrong Things

vividness stands in for frequency; how easily an example comes to mind is not how often it happens