QUOTE(scubatim @ May 12 2008, 12:01 PM)

It has been brought up time and again in my short life at

that opinion articles are not credible sources in debate. Then there are those that disagree.
Beyond opinion articles:
What exactly do you find to be credible sources? Why?
What exactly do you not think are credible sources? Why?
Nighttimer has been busting my chops over "sources" lately. Indeed, NT even runs to a dictionary to determine the meaning of
ad hominem.

So, this is a very timely topic for me.
1) Credibility is usually determined by the reputation of the author and the medium, by the apparent thoroughness of the research and anaylsis,... or not.
All sources are in great part opinion sources, of course. Here is an example:
There is a book that came out in about 1991 entitled "Point Blank: Guns and Crime in America" by Florida State Criminology Prof Gary Kleck. I have it and have read it. It is the most "fact" filled book one can imagine-filled with FBI data, local police data, etc., and bound together with complex statistical models. When published, it was by far and away the most detailed and elaborate book of its kind every published. Kleck, admittedly apolitical by his own admission in the foreward of the book, addresses one very unusual point in that he creates a statistical model of how many crimes were
prevented using guns, as well as the usual types of data about crimes committed with guns, accidents with guns, etc.
In any event, most committed firearmophobes could care less about Kleck's book in that they just
know guns are bad, cause all kinds of crime, and should be banned--despite Kleck's contention that many more crimes are prevented than committed using guns, and his voluminous factual data supporting this contention. And, firearmophobes can marshall plenty of data to support their contention, I might add.
In defense of the firearmophobes, there is no doubt that any gathering of "facts" and analyzing of "facts" are colored by the point of view of and the models or systems used by the persons gathering and analyzing. In that sense, all sources are "opinion" sources. Also, anyone would have to be blind to suggest that two people cannot look at the same "facts" and come up with differing views on what those facts mean.
So many "factual" articles are written as conclusions, too--how can one know the accuracy of polling data, for example, unless one knows all the details of the process by which the data was collected and analyzed? Well, you can't, and oftentimes you do not have the time or inclination to do such in-depth research behind the scenes. Instead, you must rely on the conclusions, based upon the credibility of the author and the source.
The single most important factor in determining "fact" is understanding how big a portion of society, or the relevant subgroup in which one finds oneself, believes a certain "fact" to be true. People usually follow like sheep to the "facts". Anyone who has watched
12 Angry Men understands this. Maybe this shouldn't be the case, but it is....global warming is a perfect current example. Heck, the pack mentality on this board is an example.
Men and women are reasoning creatures but oftentimes not so rational. Our Philosphy 221 course on the "Advanced Theories of Knowledge" will begin at 2:15 p.m. in the Saginaw Auditorium.
Lest I sound like we cannot "know" anything, a la David Hume, well, I think I know I am typing this now....
2) Non-credible sources? Anyone who does not agree with me, of course.