Well, if the conditions are such that the positive would be absolutely certain to leave evidence, then the lack of said evidence is good enough. Like, I say it’s not snowing where I live. Absolutely nobody in my town sees so much as a single snowflake. Also, it’s 72° out. Haven’t I proven to a reasonable degree that it’s not snowing where I live?
Well, if the conditions are such that the positive would be absolutely certain to leave evidence, then the lack of said evidence is good enough. Like, I say it’s not snowing where I live. Absolutely nobody in my town sees so much as a single snowflake. Also, it’s 72° out. Haven’t I proven to a reasonable degree that it’s not snowing where I live?