Let me try to restate it in absolutist terms that you actually think you can understand: If I believe nothing matters, why would I care whether any statement can be regarded as true?
Believing that nothing matters is not the same as not caring about the truth. Presumably there is at least one truth that all nihilists care deeply about, namely, that nothing really matters.
As I tried to indicate above, belief that nothing matters is not the same as not caring about the truth. I can believe that, ultimately, life is pointless and there is no inherent value in living and still take an interest in the concept of truth.
I’m not sure why this is so hard to get across.
Second: Only that which can be stated in the language of science can be true.
Third: The only things that we know to be true are the things that science has demonstrated to be true.
The conclusion that I actually do care can be made from Second and Third. There is an aspect of discrimination implied by deciding what statements we will say have been demonstrated.
Hence, I am not a nihilist. I note the importance of obtaining empirical knowledge combined with the insights obtained from inter-laboratory comparison. The ability to design experiments that are subject to inter-laboratory comparison is a measure of understanding of theory not to be trifled with.
Since you seem to think I care about the latter, your First and Second are self-contradicting.
But the First statement, NOTHING MATTERS, is consistent with your caring about the truth. Again, if I believe that nothing matters, I only believe that life is ultimately pointless, that there is no inherent value in living or in nature or anything else. But, having said all of that, I still may care about the truth.
Work on your reading skills, walter.
Why the need to provoke offense? Do I deserve this? Have I offended you by suggesting that you might be a nihilist? If so, just say it, there is no need to continue the string of insults.