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Replying to @elonmusk
"No absolution offered by beguiling doctrines, even in the areas of philosophy and theology, can make man truly happy: only the Cross and the glory of the Risen Christ can grant peace to his conscience and salvation to his life".
- John Paul II
Veritatis Splendor
Gestalt retweeted
NATO phonetic alphabet
A - Alfa
B - Bravo
C - Charlie
D - Delta
E - Echo
F - Foxtrot
G - Golf
H - Hotel
I - India
J - Juliett
K - Kilo
L - Lima
M - Mike
N - November
O - Oscar
P - Papa
Q - Quebec
R - Romeo
S - Sierra
T - Tango
U - Uniform
V - Victor
W - Whiskey
X - Xray
Y - Yankee
Z - Zulu
Gestalt retweeted
"Diplomacy is the art of telling people to go to hell in such a way that they ask for directions."
*- Winston Churchill
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Use of Sun and Stick for direction. ✍️
1. Place a stick upright in the ground.
2. Mark the tip of the shadow cast by the Sun.
3. Wait 15-30 minutes, then mark the new shadow tip.
4. Draw a line between the two points — this line runs East-West.
5. The first mark is West; the second mark is East.
In 1974, Ernő Rubik built a wooden puzzle in his Budapest apartment to help his architecture students understand 3D geometry. He scrambled it. Then spent an entire month trying to solve it. He had just invented the best-selling toy in human history - and could not figure out how to undo what he built.
Fifty years later, Max Park solved the same puzzle in 3.13 seconds. The fastest human solve of 43,252,003,274,489,856,000 possible configurations ever recorded. A world record set in 2023 that most people cannot even comprehend watching in real time. Working Note No. 20 explains the exact mathematics that separates those two outcomes.
The number that makes every human brain shut down [Section 7] -
43,252,003,274,489,856,000. That is the total number of possible Rubik's Cube configurations written out in full. The document writes it as 4.325 × 10^19.
If you shuffled one new configuration every second since the Big Bang 13.8 billion years ago - you would have seen 0.00000003% of them.
What the formula that counts every state looks like [Equation 6] -
N = 8! × 3^7 × 12! × 2^11 divided by 12. Eight corner pieces, twelve edge pieces, six fixed centres. Every rotation is a permutation. Every permutation is a mathematical object. The entire cube is a group - called the Rubik's Group - with exactly 4.325 × 10^19 elements.
Rubik did not know this when he built it. He was an architect, not a mathematician.
How long random moves would take to solve it [Section 9] -
At 1 move per second: 1,370,000,000,000 years. At 1,000,000 moves per second: still 1,370,000 years. The universe is 13,800,000,000 years old. Random solving is not a strategy. It is a mathematical impossibility disguised as a game.
Max Park does not solve it randomly. He uses CFOP - a sequence of algorithms that exploits the group structure of the cube directly.
The theorem that took 35 years and Google's supercomputers to prove [Section 10] -
God's Number: every single scrambled Rubik's Cube on earth can be solved in 20 moves or fewer. Not 21. Not 25. Twenty. Maximum.
This was proven in 2010 by a team of mathematicians who borrowed computing power from Google. The proof required 35 CPU-years of calculation to check all 4.325 × 10^19 positions. It took humans 35 years after the cube's invention to confirm what the mathematics already guaranteed.
What a single face rotation actually does to the cube [Section 11] -
U = (e1 e2 e3 e4). One clockwise turn of the top face cycles four edge pieces through four positions. Repeating this exact move four times returns every piece to its original location. U^4 = I. The identity. The math closes perfectly.
This is why speedcubers like Max Park can solve 43 quintillion possible states in 3.13 seconds. They are not memorizing solutions. They are executing permutation sequences that group theory already proved must work.
The quote Ernő Rubik gave about the moment he first solved his own cube -
"It was wonderful to see how, after all the thought I had put into building it, it still had secrets to reveal to me."
He spent a month discovering what Working Note No. 20 proves in 12 pages of group theory and combinatorics.
Working Note No. 20, September 2026
Discrete Mathematics, Permutations and Algorithmic Transformations Series
save this
Gestalt retweeted
Newton imagined gravity as a force pulling two masses together. Einstein took the idea further: what if gravity is actually the shape of space and time?
In 1915, he published his general theory of relativity, showing how mass and energy curve spacetime, influencing how objects move. Newton’s equations still work remarkably well for everyday life, but Einstein’s explain things like light bending around the Sun and time passing differently near massive objects.
The surprising part is that gravity doesn’t just move matter through the universe. It helps shape the universe matter moves through.
Gestalt retweeted
The speed of light in a vacuum is exactly 299,792,458 metres per second, not an experimental measurement but a definition, because since 1983 the metre itself is defined as the distance light travels in 1/299,792,458 of a second.
The circularity is intentional: fixing the speed of light as exact makes the definition of length stable across the universe, independent of any physical artefact that could change over time.
Gestalt retweeted
Which engineering invention from before 1900 still shapes your daily life most?
A) The steam engine (1712-1769) - enabled industrial manufacturing and mechanised transport
B) Reinforced concrete (1867) - every building and bridge you use
C) Alternating current power grid (1880s, Tesla/Westinghouse) - the system that electrifies everything
D) The internal combustion engine (1876, Otto) - still powers most transport globally
Gestalt retweeted
Charles Babbage designed the Difference Engine in 1822, a mechanical computer for calculating mathematical tables.
The British government funded it.
Babbage never completed it.
Not because the design was wrong.
Because the manufacturing tolerances required (parts accurate to fractions of a thousandth of an inch) were difficult for workshops in England to reliably produce in the 1820s.
Cost, the sheer quantity of parts, disputes with the engineer, and project management issues also played major roles.
The idea was correct, but the combination of industrial capability and practical circumstances made completing it extremely hard at the time.
In 1991, the Science Museum in London built a working Difference Engine No. 2 from Babbage’s original drawings. It worked perfectly.
Babbage was right. He was just 170 years too early.
Gestalt retweeted
This is a great pre-Code Betty Boop: short skirt, a clear bloomers gag when she bends over at the door, and the usual Fleischer surrealism.
Betty Boop’s Halloween Party
(1933)
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Cornell's "Machine Learning for Intelligent Systems"
by Kilian Weinberger
One of the most popular intro ML courses online, covering everything from k-NN to deep nets.
Lecture Notes: cs.cornell.edu/courses/cs478…
Lecture Videos: youtube.com/playlist?list=PL…



























