to carefully separate particular facts from a great deal of information What has always been interesting for me is how you can tease out the reasons for an event as you review its history.After a while, you learn how to tease out the errors hidden in texts.
Lure out, obtain or extract with effort, as in We had a hard time teasing the wedding date out of him. This term alludes to the literal sense of tease, "untangle or release something with a pointed tool." [Mid-1900s]
To remove or obtain something by or as if by untangling or releasing with a pointed tool or device: I teased the knot out with a pair of tweezers. The interviewer teased the truth out of the politician.