Originally Posted by
Rowan
And this is where the thread falls down. While it might seem unbiased, it isn't because it relies almost totally on subjective assessments of visual appearance and noise.
Something can be subjective, yet unbiased.
My point was that at the start of this experiment, I had no bias. I was neutral as to which was better. I was not prejudiced towards paraffin or oil. If it had been more trouble and effort, I would have reported that in an unbiased way. If I were a paraffin manufacturer, I'd be biased, and my subjective evaluations could not be trusted.
Note that I am no longer unbiased. I like paraffin much better than oil now.