The fire triangle is a useful teaching tool, but fails to identify the fourth essential element of fire: the sustaining chemical reaction. This has led to development of the fire tetrahedron: a triangular pyramid having four sides (including the bottom).
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Irnsrgn
Knowledge must be shared or it lies dead in the mind.
The Blacksmith must use Hammer and Flame to force the iron down the path of his own choosing.
I usually find it much easier to be wrong once in while than to try to be perfect.
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