One day, a Thinker saw something they shouldn't have and tried to tell the world.
They were caught. But out of that grizzly end came the Heart, a macabre device that carries on that Thinker's self-appointed role.
The Heart is a strange device that gives off a minor S.E.P (Somebody Else's Problem) field relating to itself, causing those that perceive it to believe it unimportant and uninteresting. However, you have an immunity to this effect, allowing you to see it for what it truly is.
By directing the Heart at a subject, it will begin to whisper to you the secrets it sees, beginning with mere rumors and conjecture, but slowly building up to revealing long buried truths. This works better the more informed the heart already is, working off existing data points. You cannot direct the type of information the Heart finds, although it will generally trend towards what you don't know, or at least a fresh perspective on things that you do know.
Keep in mind that while the heart is never wrong, it doesn't always tell the full truth of the matter either and sometimes its strange choice of wording and omissions can imply deeper meaning when there is none there.
You should be able to get roughly an hour of (non-consecutive) use out of the Heart per day, albeit when it's being pushed to the end of that hour the quality of the answers will begin to drop by a noticeable amount.