Echinacea
Scientists actually are uncertain whether fish actually feel pain or not.
So they can be sure that the data they are releasing to the rest of the scientific community and world is actually correct.
Whether the depression is due to distrust or resentment, or due to mood swings, or due to health issues, or due to grief.Is depression a characteristic mental symptom?
Data Scientists can help determine whether or not that difference is significant enough to warrant increased attention.
i dun kno
hoi
As with any illness, you don't get to choose whether you get it or not.
A depression test is a screener that can help diagnose whether someone is depressed. Usually it takes the form of a questionnaire in which the patient rates how he has felt recently.
Scientists that study the solar system.
It depends on whether they have ever seen one or not.
poor little Pluto
Scientists are often trying to find out whether certain factors changed or remained the same.