We refer in big history to these moments as threshold moments.

This minus 1, 2, 5, and 4.

let's look at the lecture based classroom, and let's pick the median performance as a threshold.

And I'm just showing this to you again because it's so nice.

From set A to set B.

A universe appears, an entire universe.

That's all it tells us.

This is the range right here.

It's established policy. That's where that no such thing as safe radiation that comes from the linear no threshold hypothesis.

That might maybe look like this, and if you now threshold this hypothesis at 0.5, you end up with a threshold that's around here so that everything to the right of this point you predict as positive, and everything to the left of that point you predict as negative.

Too hot, too hot.

The distribution changes to alive!

Control

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But look at this closely.

You can see that actually they've crossed a different threshold.

The chain of command is responsible for...

Flight control and engine power are routed separately.

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Hardware control