The phrase "theoretical notions" is correct and usable in written English.
You could use it to refer to abstract ideas related to a topic, particularly those that have not yet been tested or put into practice. For example: "These theoretical notions regarding quantum mechanics will need to be further explored before being put into practice."
The movie comes full circle in its theoretical notions and in its philosophy of the image.
"Theoretical notions of humanity and religion," he flatly declared, "cannot shake the commercial fact that their labor is of great value and cannot be dispensed with".
In the past, top school performance used to be seen in vague terms and theoretical notions, but excellence today must also mean excellent outcomes — especially in science, where applicability is everything, the report says.
How human beings think and feel about morality is integral to what it means to them, but Greene tends to displace these culturally accreted understandings by clever-sounding theoretical notions – including ideas borrowed from the prevailing versions of market economics.
Therefore, he argues that new theoretical notions are required for theorising about cybercrime.
Mixing theoretical notions of social change with concrete experiences of community organizing, Addams was a caring radical.
In recent weeks this theoretical notion received what might be its strongest support yet.
This is no longer merely a theoretical notion; interactivity is the buzzword in art as well as in the electronic media.
He recalls Madison's and Jefferson's early theoretical notion of a state's right of nullification -- in this case, of President John Adams's oppressive Alien and Sedition Acts.
I don't agree; but Marmande offers a theoretical notion that's worth considering, because it represents the cinema in terms that condemn in advance some worthy films: All fiction is just a moment in documentary.
The theoretical notion that price instruments (carbon taxes) and quantity instruments (emissions targets) are equivalent, RFF researchers argue, is true only if the costs and benefits of reducing emissions are pretty certain.
