The Bereans "searched the scriptures daily to find out whether these things were so" (Acts 17:11 NKJV)
They searched to find out if these things were true.
They were not searching to prove them "false".
There is a big difference between these two.
Let's say a first grader is excited about what he just learned in class,
so he eagerly tells his friends:
"I learned about negative numbers today. If you take five away from three, you get negative two!"
There are two kinds of responses he might get from his friends:
1) "That's stupid! There is no such thing! If you have three apples, you can't take away five apples! You're an idiot!!!"or:
2) "What do you mean? How can that be? Can you give me an example?"
Now imagine a church gathering in a home. Suppose one person says something new and different that no one else has ever heard of. Lets say there are six adults listening. Lets say for example that five of the listeners are thinking about it and are curious to know where this is going, and maybe two of them are even thinking this may really be true. But one person is thinking, that can't be true. So... five people are interested and one is opposed to what was presented.
Who speaks first?
The rest of the meeting will go one of two ways:
1) The one who disagrees, quickly speaks up and argues his point.or:
Each of the others is likely to think they themselves are the only one who thinks the idea is possibly true, they are intimidated and very hesitant to say anything for fear of being thought to be wrong or even stupid! So no one else says a word.
2) One of the five who are interested and curious speaks up with almost any kind of positive, interested response, and it turns into a very interesting lively discussion and a lot is learned about the question at hand.
I am not saying that the one who sees a problem should not speak, but rather he should not be the first to speak quickly! Wait to see where this may go, and give the cautions gently and not dogmatically.
A further word about proving something "true" or "false":
A well known example is the question of whether there is such a thing as a "black swan." Just because there may be billions of people who have seen white swans and never seen a black one does not prove anything. But if only a very few people have seen a black swan, it is actual evidence that there may really be black swans.
In 1 Cor. 13 Paul says "love ... believes all things." (v. 7 ESV, NKJV, [KJV 'believeth'], ASV, Berean Literal Bible and many more)
It is not that love is gullible, but love is open to hear what anyone says, as being valuable and possibly true.
Love is not quick to say "You're wrong!"
The one who quickly declares "You're wrong" is not acting in love.
"Let all things be done for building up", not for tearing down. (1 Cor 14:26)