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<<|
----
My latest posts can be
found here:
  * ColinsBlog
----
Previous blog posts:
  * TheBalladOfBunter
  * InfiniteRamseyTheorem
  * SignalReflection
  * AnalogiesNotConsideredHarmful
  * TwitterReplyVsQuoteTweet
  * ProofsToMakeYouGoWOW
  * LaptopPurchaseAdviceReceived
  * BlowUpYourAbilityBalloon
  * AFactletForAll
  * AnatomyOfAHit
  * SellYourselfSellYourWork
  * AllTheLetters
  * BeingSlowToCriticise
  * StateMachineInRealLife
  * CoxeterOnceNerdSnipedConway
  * NotAlwaysYourFault
  * RememberingConway
  * PerceptionOfSpace
  * ParallelogramPuzzle
  * BackOfTheEnvelopeCOVID19
  * APointAgainstTheAxiomOfChoice
  * InDefenseOfTheAxiomOfChoice
  * JourneyingHomeThroughStormDennis
  * EarthRadiusRefined
  * VolumeOfASphere
  * BigOhAndRelations
  * MathematicalRelations
  * IntroducingBigOh
  * ConstantDifferences
  * AlgorithmsAndSizesOfInstances
  * IntroducingTimeComplexity
  * TheLinearFrog
  * SeventyVersusOneHundredRevisited
  * HowTheFarragoWorks
  * SeventyVersusOneHundred
  * PowersOfTwoInLexOrder
  * EmergingEExpanded
  * RageInducingSystemImplementation
  * TheBookIsNotAlwaysRight
  * EmergingE
  * ImpossibleToTranslate
  * WaitingInVain
  * NonRepeatingDecimals
  * RationalRepeats
  * WhyIsItLovely
  * CompilingCryptoConnections
  * ExploringConnectionsBetweenCryptoSystems
  * ElwynBerlekampHasLeftUs
  * RootCauseAnalysisAndThePhotocopierQuestion
  * TheUpDownTides
  * TheForeAftTide
  * TheSidewaysTide
  * WrappingUpWrappingUpTheEarth
  * TheOtherWrappingTheEarthProblem
  * WrappingTheEarth
  * TheRingOfSteel
  * RoundingUpTheRopes
  * OtherOtherOtherRopeAroundTheEarth
  * RopeAroundTheEarthRefined
  * TheOtherRopeAroundTheEarth
  * ElementaryEstimates
  * LatitudeCorrection
  * JustGiveMeTheAnswer
  * MoreMusingOnPollardRho
  * IdleThoughtsAboutPollardRho
  * WhenOptimisingCodeMeasure
  * ADogCalledMixture
  * AnotherPayPalScam
  * WhyTopPostingHasWon
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  * ConsideringASphere
  * ToLinkOrNotToLink
  * GenericAdviceForWritingAThesis
  * JustTeachMyChildTheMaths
  * NotASpectatorSport
  * LeftTruncatablePrime
  * TheDoctorAndTheLawyer
  * FourPointsTwoDistancesProof
  * MeetingRonGraham
  * NapkinRingVersusSphericalCap
  * TheFourPointsPuzzle
  * RadiusOfTheEarthPartTwo
  * GrepTimingAnomaly
  * TheRadiusOfTheEarth
  * ThisWorksToCureMyHiccoughs
  * PerhapsWeSavedOne
  * ThinkingAboutMastodon
  * DisappearingTrainsOnVirgin
  * TheIndependenceGame
  * OneOfMyFavouritePuzzles
  * ThinkingAboutRecursion
  * MemorisingTheTube
  * SpikeySpheres
  * SurprisinglyQuick
  * AnUnexpectedFraction
  * YouHaveToAdmireTheirOptimism
  * RepresentativesMatter
  * PythagorasByIncircle
  * APuzzleAboutPuzzles
  * HowNotToDoTwitter
  * Calculating52FactorialByHand
  * SmallThingsMightNotBeSoSmall
  * NotIfYouHurry
  * FactoringViaGraphThreeColouring
  * AnotherProofOfTheDoodleTheorem
  * WhenObviousIsNotObvious
  * GraphThreeColouring
  * TheDoodleTheorem
  * BeCarefulWhatYouSay
  * TheMutilatedChessboardRevisited
  * AMirrorCopied
  * TheOtherOtherRopeAroundTheEarth
  * PhotocopyAMirror
  * ThePointOfTheBanachTarskiTheorem
  * SieveOfEratosthenesInPython
  * FastPerrinTest
  * RussianPeasantMultiplication
  * FindingPerrinPseudoPrimes_Part2
  * FindingPerrinPseudoPrimes_Part1
  * TheUnwiseUpdate
  * MilesPerGallon
  * TrackingAnItemOnHackerNews
  * HackerNewsUserAges
  * PokingTheDustyCorners
  * ThereIsNoTimeForThis
  * PublicallySharingLinks
  * LearningTimesTables
  * GracefulDegradation
  * DiagrammingMathsTopics
  * OnTheRack
  * SquareRootByLongDivision
  * BeyondTheBoundary
  * FillInTheGaps
  * SoftwareChecklist
  * NASASpaceCrews
  * TheBirthdayParadox
  * TheTrapeziumConundrum
  * RevisitingTheAnt
  * TheAntAndTheRubberBand
  * IrrationalsExist
  * MultipleChoiceProbabilityPuzzle
  * RandomEratosthenes
  * WrappingUpSquareDissection
  * DissectingASquarePart2
  * DissectingACircle
  * DissectingASquare
  * AnOddityInTennis
  * DecisionTreeForTennis
  * DecisionTreesInGames
  * AMatterOfConvention
  * DoYouNourishOrTarnish
  * BinarySearchReconsidered
  * TwoEqualsFour
  * TheLostPropertyOffice
  * TheForgivingUserInterface
  * SettingUpRSS
  * WithdrawingFromHackerNews
----
Additionally, some earlier writings:
  * RandomWritings.
  * ColinsBlog2010
  * ColinsBlog2009
  * ColinsBlog2008
  * ColinsBlog2007
  * ColinsBlogBefore2007
********
The machine wouldn't read my credit card.

That's not uncommon ... sometimes the contacts on my card are
dirty, sometimes the contacts on the machine are dirty ... no
big deal.  Just lick your thumb, rub the contacts, and try again.

So I did that.  Or at least, I /tried/ to do that.  But I was
wearing a mask.  Have to say I felt rather stupid.

Still, it reminded me of a story recounted by Charlie Duke.

Brigadier General (ret'd) Charles Moss Duke Jr was the tenth man
to walk on the Moon, and CapCom for the Apollo 11 Moon landing.
Neil Armstrong personally requested that Charlie be the CapCom,
and it's Charlie's easy-going Southern Drawl you hear on the
famous recording saying: "Roger, Tranquility. We copy you on the
ground."
[[[> Recording of the descent and landing:
  * https://www.nasa.gov/62283main_landing.wav
]]]
RachelWright and I saw him speak in 2012, and he was engaging,
informative, charming, and a real delight.

But one of the anecdotes he told us was about changing the film
magazine on the camera that was mounted on the front of his space
suit.  He'd finished one film, removed the magazine, and was
about it insert a new one when he noticed it was a little dirty.
So he went to blow the dust off.

Well, that doesn't work so well when you're wearing a space suit,
with a space helmet, in the (near) vacuum of space.  He said:

* "The guys at Mission Control didn't say anything,
    but I could hear them laughing."

OK, so trying to lick your thumb though a face mask isn't all
that much like trying to blow dust of a film magazine when you
are on the Moon, but maybe it's a little like it, and I'm happy
to feel a little kinship with Charlie Duke.

Even if I do still feel a bit stupid.

Is there a moral to the story?  Probably not, but it's worth the
observation that reflex actions /and/reactions/ are sometimes
inappropriate, and yet incredibly hard to prevent and change.
----

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----
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