There is a piece of folk law in physics that says:
“If a paper or talk has a title that is a question the answer is no.”
This concept also exists in journalism where it is known as Betteridge’s law of headlines
“Any headline which ends in a question mark can be answered by the word no.”
In my experience the law holds much more often than not. However, last week I made an attempt to flout it by giving a talk at Queen Mary where the title was “Can you detect dark energy in the laboratory?”, and I argued that the answer was “possibly” or even “probably, given enough time and the right experiment”.
A much more striking counter example to this rule is a paper by Einstein with the title “Ist die Trägheit eines Körpers von seinem Energieinhalt abhängig?” which can be translated as “Does the Inertia of a Body Depend Upon Its Energy Content?”
Einstein showed that the answer to this question is “yes” and that gives us the famous relationship between mass and energy: