Would you prefer that it were? Knowledge is always less than perfect, and thus only a fool claims to have absolute certainties.
Their language always contains "outs" in case of some new discovery.
Yes, exactly. This is a *good* thing, not a bad thing as you seem to be trying to imply.
But unless some contrary evidence eventually arrives to point to some other conclusion, the wise man gives provisional acceptance to what the currently available evidence indicates.
Must have been in "science" class that bjclinton came up with "depends on the meaning of "is" is.
Wow, what a childishly inappropriate and cheap shot.