Todenperäistä arveluksesi

Kun Descartes lausui 1600-luvulla “Ajattelen, siis olen” hän onnistui teroittamaan ihmisten mieliin “epäilkää kaikkea mahdollista”. Eric Riesin vuonna 2008 julkaisema lean startup menetelmä puhuu samasta asiasta: “Validoi hypoteesisi.” Kun kerran yritysmaailma muuttaa tietoa rahaksi ja tiedemaailma rahaa tiedoksi, ne saattavat vaikuttaa olevan kuin eri planeetoilta kotoisin, mutta hypoteesien muodostaminen ja niiden validoiminen toimii yhdistävänä tekijänä kyseisten maailmojen välillä. Mutta ilmaisu “validoida hypoteesi” on vierasperäinen; voisiko sille löytää kansankielisemmän vastineen?

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Prisoner of curriculum dilemma

There’s a story about a physical education and biology teacher who worked in a secondary school in a town in south-western Finland. He was a bird lover and skilled in producing authentic bird singing sounds of extensive amount of bird species. The man was also a professional basket ball player with the nickname “Killeri”. During the lunch break in school he enjoyed playing basketball with pupils and obviously had a bit of competitive instinct; it was not uncommon that he would shout furiously “Do you want to play?!?” if fellow players seemed to have too lazy an attitude towards the game. Coming to the point, this man also had an interesting philosophy of teaching: during his biology class he separated boys and girls, arranged boys together (14 years old or something) and taught elementary to advanced tricks regarding how to warm up a woman.

Chaos

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Sukulaisuussuhteen geneettinen määritelmä

Eri kulttuureissa suku tarkoittaa tuhottoman eri asioita, vrt. muslimit, mustalaiset, intialaiset tai suomalaiset. Wikipedian mukaan “verisukulainen on henkilö, joka on toisen sukulainen suhteellisten läheisten yhteisten esivanhempien kautta eikä avioliiton tai adoption kautta.”

Määritelmä on sekava joten koitin laatia täsmällisemmän:

Henkilö A ja henkilö B ovat sukulaisia keskenään silloin ja vain silloin kun Continue reading “Sukulaisuussuhteen geneettinen määritelmä”

Never underestimate a device that measures something

Years ago when I was reading lecture notes on linear algebra I found in the margin:

  • “Never underestimate a theorem that counts something.”

In the context of learning about the structure of abstract entities such as vector spaces, this piece of wisdom seemed pretty striking. It can be understood so that the extensive mathematical number crunching and modeling machinery can always be put into action if you find a way to measure things – even if your interest lies in pure logical world.

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In the future we are all going to be teachers and trainers

Due to the rise of social media ordinary people have become citizen journalists. Nowadays we publish and act as independent commentators of politicians; professional journalists used to have a privilege to that in the past. It is intriguing to wonder which profession is the next one to go mainstream.

supervised_learning

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