None of that would stand up in a court of law. Its either you know or you don't. We are testifying as a witness. Most times what they know is beased on what others have told them. I can usually tell who really feels they know and who is just going through the words.
Luckily for us, Fast and Testimony meeting is not a court of law, otherwise many good people might be prosecuted for perjury. As it is, we can take into account the various different ways that the word "know" is used. For example, one definition of the word "know" that I found was the following:
"2 a : to be aware of the truth or factuality of : be convinced or certain of"
That seems to be the way that most people are using the word "know" when they are bearing their testimonies, and since they are using the word in a way that is perfectly acceptable, according to the dictionary, I don't feel that there is any reason to find fault with the way that they are using it.