Nitpick: it can be if you redefine numbers and/or operations. Math is not science (but is used as a basis for science) and you can yourself redefine what 2, 5, + and = mean, and use that new set accordingly. Just like you can make "Sky is green" true if your redefine what either "Sky", "is", or "green" mean - language is also not science so it can be redefined.