Investors could not be unknowingly harmed.

FORBES: Rating Agencies "Sold" the SEC on Asset Backed Securities

In a statement released Saturday morning, Augusta National explained that the rules committee had spoken with Woods and decided he had made the mistake unknowingly and did not disqualify him.

WSJ: Tiger Woods Penalized for Illegal Drop

That's not until her uncle finally told her what no one else had: She had unknowingly married the father she never knew.

CNN: Secret revealed: Ohio woman unknowingly married father

Meanwhile patients who unknowingly take counterfeit drugs often are poisoned or get sicker because they're not receiving what the doctor prescribed.

NPR: Drugmakers, Interpol Ramp Up Fight Against Fakes

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