Ez triviális...

Mathematicians, as well as their opposite numbers, have responded
eagerly -- and repetitively -- to our essay question "Why is it
only mathematicians who say 'Why is this obvious?'"

More than 80% of the respondents said, "Because." When respondents
answered anything with other than "Because," it usually "Why not?"
Several of the other answers stood out, for various reasons:


"Because mathematics is the only profession in which thepractitioners are intelligent enough to realize that every personon the planet is, basically, an idiot, and therefore might needsome time in order to comprehend the perfectly obvious."
        -- Investigator J.C. Jamison


"The assertion is patently false.  Why is this obvious?"
        -- Investigator B. Kallick


"Given that the abstract algebra professor has red hair, andteaches ring theory, then this is clearly a red hair ring."
        -- Investigator L. Sherman


"Missing comma.  The quote should have been:  "Why, is this obvious?"Much more in line with a mathematical professor's image."
        -- Investigator Felix Finch


"Because math is the only subject where anything is *allowed* tobe obvious. In any other science, you have to get a grant, run anexperiment, write an excruciatingly equivocated research article,and have it peer-reviewed and published and cited in at least 3literature overviews. THEN it's obvious."
        -- Investigator David Lantz

Q:  Why is this obvious?
A:  That depends on what your definition of 'is' is.
        -- Investigator T. Rose

forrás: http://www.cnonline.net