Knowledge is personal, unique, utilitarian, and subjective and exists only to the individual acting upon it. Unlike information, it cannot be shared. Information, on the other hand, is impersonal, general, objective, and only potentially useful. It can be freely shared, but its sharing does not assure its usefulness to another person. In fact, one may make any number of uses of information.
Opinions are assertions or statements that a person believes to be true.
The truth or validity of an opinion is subject to dispute and open always to tests of truth or falsity. Even though the holder of an opinion believes a particular opinion to be true, there is at least an informal obligation to verify or support the opinion. The opinion holder may refer to any of the conventional methods of proving citation of authorities or experts, anecdotal experience, logical deduction or inference, or scientific support with varying degrees of confidence. If after that degree of mental processing you are convinced of an opinion's validity, you may test it one step further by acting upon it, by actually risking resources on a predictable outcome. When one acts upon opinion, the opinion approaches the status of knowledge.