"would be theoretically" is grammatically correct and can be used in written English.
It is typically used to emphasize something that could possibly happen in a hypothetical situation. For example: "If the virus could be spread through water, it would be theoretically possible to get sick from swimming in a contaminated pool."
German league CEO Christian Seifert confirmed that it would be theoretically possible to have the necessary facilities in place by next week.
It is unlikely that Einstein's equation was much use in designing the bomb, beyond making scientists and military leaders realise that such a thing would be theoretically possible, but the association has stuck.
We should also look forward to gravity control and colonisation of the solar system (adding with retroactive poignancy that "'It would be theoretically possible... to ship back lunar products aboard robot freighters …(for) only a few pence of chemical fuel").
For instance, the Federal Bureau of Investigation ignores smallpox as a major danger, possibly because the virus was eradicated from human populations decades ago and would be, theoretically at least, difficult to obtain.
Earlier in the day, during a four-hour stop in the Philippines, Mr. Gates said that North Korea might be preparing to launch another long-range missile that would be theoretically able to reach Alaska and Hawaii as well as American military targets in Japan and Guam.
It would be theoretically possible but extremely difficult.
It would also be theoretically possible to exploit bugs in other chipsets – such as graphics controllers or bus controllers.
If basic science could give us perfect confidence in the safety and efficacy of an intervention, then clinical trials would indeed be theoretically superfluous.
Given these regions provided the best classification of ADHD from controls, the proposed model would appear to be theoretically valid.
So if everyone was living indoors, things would be fine: "Theoretically we could grow vertically forever," he says.
"It would be nice theoretically to do big programmes of intervention from police to prosecutors to courts to prisons to oversight mechanisms, but in this fragile political context, that's pretty impossible at the moment," says Arthy.
