"Theoretically speaking," and its more scientifically correct cousin "hypothetically speaking," are used to introduce an informal idea or question, often one that might seem silly or out of place, in order to open debate on the matter or get people thinking, or to answer with a best guess based on some domain knowledge ...

How do you use theoretically?

Theoretically in a Sentence

1. Theoretically, exercise is supposed to help you lose weight, but working out doesn't seem to do much for me. 2. Although theoretically, it could rain any day of the week, it isn't likely to rain in the desert during July.

What does it mean to speak theoretically?

A hypothesis can be a broad idea, question or proposal. ... When you say “theoretically speaking”, you are formulating your thought or idea based on a valid theory but you are not sure as to its practical implication.