It is such a pity that this Verification Principle
has closed so many people's minds so they are unable to explore a reality that is beyond touch, taste and sight.
And indeed, on Ayer's standards, it seems that the verification principle is as metaphysical as talk of God.
Payne cites philosophers, who question the verification principle of A.
The first of these, unsurprisingly, is that of the logical positivists, and traces the familiar history of the demise of the verification principle
where monitoring methods did not meet the verification principles
or where emission data was uncertain).