"The probability of rain tomorrow is ten percent."
That is a clear statement of probability, with no "maybe" in it, and it doesn't mean what you say. But there is a difference between whether the statement is highly probable and whether the statement deals with a high probability. This statement deals with a low probability but, depending on the reliability of the weather department, the statement may possess a high probability of being true.
In contrast, "It might or might not rain romorrow" is not a clear statement of probability.
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