What does unknown mean to me?
It means I have no date. I either looked for one and didn’t find one, or I didn’t look for one yet.
What does uncertain mean to me?
It means I have a date, but I haven’t proved that it is correct or not? I don’t even know if it is an estimated date or not.
What does estimated mean to me?
It means I have a date that is made up. It’s my best guessestimate, and I know that it is an estimated date.
Note: WikiTree should NEVER have combined these two separate conditions with one radio button. How am I supposed to distinguish between the two conditions? Except by tracking down a research note.
What does calculated mean to me?
It means I have a birth or death date only and the number of years, months and days lived, The two were used to calculate the birth or death date.
What does after this date mean to me?
It means I have a reliable source that states that the person was alive on a particular date. So, I can then use after as a reasonable delimiter with the date because of this source.
What does before this date mean to me?
It means I have a reliable source with a date that states the person has died prior to this date. So, I can then use before as a reasonable delimiter with the date because of this source.
What does certain mean to me?
It means I have a date and I have examined enough reliable sources and believe this date is correct.
What does eyewitness/exact mean to me?
It means I was present or I have first hand knowledge that the date is exact/correct.
Edited: Edited the last two questions to remove ambiguity.
Edited: reordered the first three questions.
Edited: added questions for "after this date" and "before this date" as they pertain to death