"You will find what you are looking for. When you know what the results are you need, there are many examples of otherwise good scientists who manage to FIND those results, whether they are correct or not. Just human nature."
"In order to obtain a certain result, You must want to obtain precisely that result; if you want to obtain a certain result, you will obtain it .... I need only such people as will obtain the results I need". Trofim Lysenko
Nice to see where you learned your Science. Want to give us some examples of "otherwise good scientists" you mention above?
Only in an evolution debate would a simple statement of fact cause an argument.
We do double-blind studies because researches know that, no matter how nobel their intentions, KNOWING what result they want, and having access to data that could allow them to manipulate the results, the results often end up manipulated even though they would swear they didn't do so.
Like I said, it's standard practice, because it's a well-known phenomena. Several of the major "gaffes" that in evolutionary thinking were caused not by people TRYING to deceive, but people who were honorable scientists who simply saw what they expected to see.