The phrase "is not controllable" is grammatically correct and can be used in written English.
It is typically used to indicate that something cannot be regulated or managed. Example: The weather is not controllable, so we must always be prepared for unexpected changes.
The friction coefficient is largely a function of the Reynolds number (the product of water density times ship speed times ship length, divided by water viscosity); it is not controllable by a designer since water density and viscosity are beyond control and ship length and speed are almost inevitably dictated by other considerations.
Bruce enlarged is not controllable — that's why he scares people and himself.
Groundwater flow is not controllable, except where highly restricted flow can be tapped.
Luck of course is not controllable, but what will anger some viewers is that there were systemic problems.
Similarly, any given local authority cannot control the numbers of children in its area requiring statutory intervention; demand is not controllable as it is if you are running a children's home or a prison with a fixed capacity.
"With Chechnya, the main headache is a strong leader who is not controllable, but at least he is in charge," said Pavel K. Baev, a senior researcher at the International Peace Research Institute, which is based in Oslo.
But if you're already strongly invested in that viewpoint, there's probably more to be gained from exploring the ways in which life isn't controllable, or the possibility that you don't know what's best, that reason isn't always the answer.
The pitch that "both sides are to blame" and the anarchist anti-government rhetoric that pervade the Republican message have made the "independent" population so large that it isn't controllable, and it is beginning to turn on the extremists.
A mature person knows that the world isn't controllable, and nor are other people.
The latter is an insecure and cynical response to a world that isn't controllable.
But this is a system in which many parties, many countries, many governments, many electorates participate and we could have events which, rationally, are not controllable," he said.
