Argh, how I love it when someone assumes without any #source that parents married before the birth of the child. This may be in most cases in the 18th and 19th century be the case, but it doesn't have to be. And when there is a source on the @wikitree profile which does not give a marriage date, I don't fill in a marriage date. Now someone added a marriage date to a couple, but did not add a source for the marriage. I deleted the marriage data again.