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If your working on a piece for publishing that will attack a figure or orgainzation, "I believe" could be useful to denote that the accusation is not based in anything provable. For example "Spide...
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#3: Attribution notice added
Source: https://writers.stackexchange.com/a/29499 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#2: Initial revision
If your working on a piece for publishing that will attack a figure or orgainzation, "I believe" could be useful to denote that the accusation is not based in anything provable. For example "Spider-Man is a threat and a menace" is a statement of fact. However, J. Johan Jamerson is opening himself to a massive libel suit (but not a Slander suit, as he's quick to correct Peter) because he's coloring his stories of events with his own intepretation of them. "I believe Spider-Man is a threat and a menace" is perfectly lawsuit free because J. Johna Jamerson is perfectly entitled to both hold his opinion and speak his professed opinion, no matter how untrue it is proven to be. I would say this example is close to @Mark Baker's first example, but dissimilar because as we all know, Jamerson accepts no opposition to his belief as reasonable. Quirks of the U.S. defimations laws to be sure, which are fairly loose and favor the publisher a great deal.