> Is the statement "the particle went through the left slot" 100% true?
> No it's not true, but the strange thing is that its logical negation is not
> true either.
I think you missed the first part of this conversation. Not every
question/statement will have 100% truth to it; indeed, you can obviously
have a statement with partial truth, despite the fact that the truth is
all or nothing.
As you note, this particular statement certainly would not fall into the
category of having all or nothing truth, but that is not to say that the
truth itself is partial. The words are fuzzy, not the truth.