Scientists aren't the best example in this case IMO. They will openly admit (a good scientist anyway) that they do not know exactly whatever it is they are researching, etc. Thats the reason they will test and research, etc. Theories, etc, may suggest something.. A scientist will tell you just that, however should or will always conduct more research.
You may not have had ill will, nor did you attempt to deceive anyone by saying, passing along information that was not true (when in fact you believed it to be the truth). Which I can imagine happens quite a bit, and there is nothing to feel bad about in such dealings. Such as, I will not even begin to pretend or pass along information I might assume about horses (I know they eat a lot, poop a lot, and people can ride them) as truths, because I do not know for certain, etc.. I can say what I know about it, but then again.. I might be lying and not even know it.
Removing the ill will or intent doesn't make a lie, not a lie. It merely removes the intent to deceive. What an honorable and good natured person would do in this case, is apologize and admit his mistake, and move on. I think this is where the difference lies.. >.> (pun intended)
Then, I'll apologize in advance, I don't mean to bring into this thread another discussion.
-Carry on.