Empirical evidence is gathered through observation and experimentation in a controlled environment. Please don't use the term if you don't know what it means.
Please don't leave your bullshit laying around. It pollutes everything.
Empirical evidence can be be gained through observation OR experimentation.(whether or not in a controlled environment).
"Empirical evidence is a source of knowledge acquired by means of observation or experimentation."
What does empirical evidence mean?
You only cheapen yourself when you pretend to be some all knowing wizard. I know what the word means.
It seems that you don't quite grasp the meaning.