How has this soldier demonstrated recurring actions, patterns, or observable behaviors that might indicate his real beliefs?
All ISIS logistics and dispositions in the field are observable by drone and satellite.
The observable Universe contains around 100 billion large galaxies and a comparable number of supermassive black holes.
Global warming is an observable fact, and transportation emissions are the second largest contributor to the problem.
Theory: a scientifically acceptable principle explaining a set of observable facts.
The same conditions were observable in regard to the bowels.
On the 15th of September, 17—, an unusual stir was observable in our village.
In the early annals of York numerous Teutonic names are observable.
An appearance of life and bustle was observable about the boat.
The same thing is observable in painters, who are more subject to lead-paralysis than perhaps any other workers in lead.
A measurable property of a physical system, such as mass or momentum. In quantum mechanics, observables correspond to mathematical operators used in the calculation of measurable quantities. Operators that do not commute, having a nonzero commutator, correspond to observables that cannot be precisely measured at the same time, such as momentum and position. See also uncertainty principle.