Care to extend the example, explain what this is. Opinions are "Bulletproof" because they cannot be shot down on the grounds of realistic assessments. If you mean opinions can change, then I whole heartily agree with you. Opinions cannot and should not be contested, simply due to the fact that opinions are not based on evidence but rather initial feeling after a certain event. Yes, opinions do spark debates, heck, they are the backbone of debates, yet do not play a vital role in discussions. If you were to put IMO, in a thesis-based paper, it would be an automatic deduction, because it just doesn't happen. Inferences however, are opinions with evidence supporting them, and are subjected to debate and criticisms because the writer must be assessed on how he weighed the evidence and facts, and whether he did a proper assessment with a fair ground. The moment an opinion is supported by a fact, the term opinion is no longer used, it's context is changed to "opinion"
Definition of opinion on dictionary.com in this context is "a belief or judgment that rests on grounds insufficient to produce complete certainty."
Definition of inference on dictionary.com in this context is "The act of reasoning from factual knowledge or evidence."
This can be any number of theoretical reasons that can be used to argue that dogs are not cute. Nevertheless, the opinion can be contested and always will be contested because people will not agree. Opinions are shot down on a daily basis, opinions are not bulletproof because opinions are not equal. The opinion of a mental retard is not equal to the opinion of PhD professor on the matter that the professor has his degree in. (You could in theory contest and destroy an oponent's opinion by simply killing them
.)
Any and all opinions can and will be contested because
that is how debates start if opinions were not contested there would be no debates.
Your own point contradicts you in that opinions are the ignition to a debate. Those opinions have to disagree with one another to start the debate, meaning that the two opinions are being contested by both sides. From there begins inference which leads to an evolution of the opinions, but, until that opinion becomes accepted as factual, it is nothing more than an opinion grounded in reality. It is nevertheless still an opinion.
Further, it is a gross over simplification that putting "IMO" in a thesis paper would be a deduction. A thesis paper was started by your opinion on a matter that you then followed up and attempted to prove or substantiate. Once it is substantiated (in the form of your thesis paper) it is no longer an opinion, it is a presentation of accrued facts that support your idea. You will not put "IMO" in a thesis because the entire thesis was based on your own cognitive thought and therein your opinion on a matter but was proved one way or the other, losing it status as an opinion.
Compare the two definitions, you'll notice that, like I said, an inference is an evolution of the initial opinion that initiated the debate. Loosely, though, it is still based on your opinion. An opinion that can, through inference, become a better point than an opinion that, through equal inference, could not, is a more valid opinion. Hence, opinions are not equal and are not bulletproof.
And thank you, as your point again contradicts itself, I originally said that opinions are evolved in debates. An inference, like you said and like I said, is an opinion that has been backed and supported, but is nevertheless still your opinion. The opinion that could not be supported or substantiated was the weaker opinion, and the opinion that ultimately lost. If the product of the opinion can be defeated then the opinion itself can be defeated. And since debates have clear winners, one opinion clearly lost in the end. This is reverse transition.
Facts are not spawned by opinions. That is a big mistake. Facts are based on measurable and concrete evidence. There are not absolutes, not even facts are absolutes. Facts are commonly accepted as true, and are never in dispute unless new evidence is presented. This is shown in several parts in real life.
During World War 1, the Ottoman Empire/Turks are known throughout the world to have caused the genocide of Armenians over a surplus of 1.5 million. There is enough evidence to convict them of such an event. British Admiral, Winston Churchill called this a "Holocaust." Yet, even to this day, the Turks, and even the Americans do not claim this as a "fact." The Turks go as far as to deny this even happened. Yet every other country, who witnessed this bloody event claims it as a fact. On an interesting note, if you claim this genocide happened in Turkey, you could actually get arrested. If you were to deny this genocide happened in France, you could also get arrested. This is one example of a "fact" dispute. Therefore, not even facts, as you say are absolutes.
I prefer not to go into the world of science in this Facts vs Inference debate since Science takes it to a whole new context of Laws and Theories. God knows how long that will take.
Facts are, indeed, spawned by opinions, but not all opinions spawn facts and not all facts are spawned from opinions. An opinion that can be taken to the ultimate level and proven and backed becomes factual. Einstein was the opinion that Newton was wrong, he supported his opinion, through inferences, by creating General and Special Relativity, resulting in his substantiated opinion ultimately being in fact, true or factual. Einstein's opinion that Newton's equations were wrong became fact, it all started from a single disagreeing opinion on the matter. Even more basic, Newton's opinion that things worked in mysterious ways that could not be explained away by religion or nonsense, also became fact. But in the end, his opinion was eventually disproven by Einstein, meaning his opinion was ultimately wrong and lost the status of factual. Everything starts with an opinion that disagrees with the majority. Socrates is another example, as is Aristotle. They were the advocates in the Greek Era of free thought, of sharing and pushing one's opinions, and of discovering the world. If opinions were not part of the creation of facts then facts would just spring up out of nowhere everyday. It takes a differing opinion to challenge the status quo and change it. Opinions are the basis for finding new facts, as is also random chance.
Your Turkish example is also poor. If there was enough evidence to convict them, why were they not convicted? There is clearly not enough evidence to make the case absolute. This is a dispute of "facts" not facts. Though you do have a point in that even facts can be disputed, which, however, puts holes in your own argument that opinions are bulletproof. At which point I have to wonder what we're arguing at this point...
I am using science as an example because it is a common place for opinions to be contested and defeated. Opinions that are further by inference and defeated, are opinions that were defeated. Ultimately, as per the string theory example, one opinion on string theory will win out. The other opinions will be proven wrong. If I am of the opinion that string theory won't work, but Person D says it will work, and say one day it is proven that string theory is as proven or disproven as can possibly be in science, then one opinion has been proven wrong. It is a very simple example of opinions being defeatable.
If you go back in time and show people, who are of the opinion that the world is flat, that in fact the world is round, you are defeating the opinion that the world is flat. You are changing their understanding and using facts to prove it, but you are still disproving an opinion because the opinion will be destroyed for those people. The opinion "died".