In both cases the notion is that people are speaking without knowledge of what they speak. If we are honest with ourselves we have all done that at one time or another. I know that I have. Or I speak beyond what I know making extensions to the topic for which I have no real knowledge.
Another, error I make is repeating what others have said or written without checking to see if they have used the data in a manner consistent with the intent of the author.
I had a seminal experience in seminary. In one intercession class, we read two books by well-known Christian authors. They were on opposite sides of a debate. We looked at the sources they quoted as well as the passages they cited as support for their positions.
Both authors mishandled their source material; either misquoting or misrepresenting the context or import of their citation. Both also, at some level, did not handle the Scripture carefully.
That experience emphasized to me that just because a well-known author has written and been published by a reputable publisher, does not mean that what they have written will withstand Biblical examination. My conclusion was and is that I must lean on the Bible. I can read and benefit from the thoughts of authors, and I read rather extensively. But, I am responsible to validate what I read Biblically. If I quote or use their material without first checking their work, I am in danger of opening my mouth emptily and multiplying words without knowledge…