The phrase "are not theoretically" is correct and usable in written English.
It can be used when discussing concepts or ideas that lack theoretical support or foundation.
Example: "These findings are not theoretically sound, which raises questions about their validity."
Alternatives: "are not conceptually" or "lack theoretical".
are not theoretically restricted in their distribution due to climatic conditions over the study area (Fig. 2).
Moreover, these on-line control strategies are not theoretically evaluated how optimal (or sub-optimal) they are.
However, in modeling this system, the multiplicity and bi-threshold behavior are not theoretically possible according to the designed interactions.
It turns out that available computational methods are not theoretically sound in the sense they rely on results of local existence.
In order to promote practical applications by engineers in medium-size enterprises who are not theoretically expertized in the FEA and the other related knowledge, various databases and intelligent user interface modules have been developed in PC environment.
Shear stress has valued as high as 10 15 dyn/cm2 in some locations of vascular system near to the heart, but these locations generally experience in-phase shear stress and tensile stretches, and as a result, they are not theoretically vulnerable.
When it came to Star Wars, that is like a universe of its own, in that there aren't, theoretically, any social rules you have to obey.
"I'm not theoretically opposed to it, and if I weren't studying it, I might think about it," she said.
"They are looking at this in a way that will allow more development even though the water is not theoretically there".
To understand why traffickers can operate successfully in a country like America, where the legal system is not (theoretically) on their side, you have to look at the collective vulnerability of their victims.
