Ofcourse, you're not obliged to to say true or false, if the circumstances render you as a valid exception to bivalence.
What matters, is that by tentative means, you don't have to observe bivalence, as it is unknown. As you say, what matters is that it is the best theory, by far. That's all that's being claimed. No scientist ever claimed that evolution is
absolutely true anyway.
link writes:
However, some philosophers wish to claim that P is neither true nor false today, since the matter has not been decided yet. So, they would say that the principle of bivalence does not hold in such a case: P is neither true nor false.
Since you lack knowledge at this time, you are genuinely an exception to the law, as far as I know. (i respect yuor approach because it's honest, which is why I came over to the dark side
)
SOURCE:
Principle of bivalence - Wikipedia
For readers:
Law
This message has been edited by mike the wiz, 03-08-2006 07:20 PM