Most biologists now accept that the tree is not a fact of nature - it is something we impose on nature in an attempt to make the task of understanding it more tractable.
Once they have happened, however, they are usually followed by further tremors, and the pattern of these is tractable.
Let us see, those who have families must be tractable, and shake hands with us and take themselves off, and leave us here alone to attend to this affair.
Teachers rarely point out that these systems are plucked from a far larger set of systems that are mostly nowhere near so tractable.
Typically, decision problems require making some sorts of assumptions about the state of the world to be at all tractable.
I never heard any harm of her; and I dare say she is one of the most tractable creatures in the world.
The Nixon Administration deliberately withhold supplies from Israel to make it more tractable in negotiations.
Triangular matrices, in particular, are usually quite tractable.
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