Don't you mean you can't prove a negative? For example:
"There is no gold in my house"
That is a negative statement which involves searching my entire house for particles of gold in order to prove it, so we can say that the proof is impossible to get (at least by our standards). To disprove the negative is easy; you just have to walk into my house and find something gold.
"There is no gold in my house"
That is a negative statement which involves searching my entire house for particles of gold in order to prove it, so we can say that the proof is impossible to get (at least by our standards). To disprove the negative is easy; you just have to walk into my house and find something gold.