explanation

A testing time (II)

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Different tests

What is a test supposed to do, anyway?

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Blast from the past

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History and pre-history

We ponder a very old story, and something that could have been an old story.

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Push or pull?

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Information flow

How do you know what you need to know?

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Historical fictions

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The history of history

Sometimes stories take on a history of their own.

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Common sense

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Everyone has it

We consider common sense as a philosophical principle.

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Moonset, Moonrise

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Signs in the sky

Was it a long day, or a long night?

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People are different

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Visual photometry

Human eyes are not the same as electronic detectors.

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The limits of knowledge

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Necessary learning

Nowadays, one needs to learn software in order to learn software.

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The decorative clock

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Hands fixed

We ponder our relationship with time, or at least with timekeepers.

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Eclipse planning

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Choosing one’s data

We contemplate activity during a very short time span.

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