A Regulation concerning Prophecy
1Cor 14:29 Two or three prophets should speak, and the others should weigh carefully what is said.
This is a regulation concerning prophets, not prophetesses. The Bible always applies the term "prophets" to men and never to women. Concerning women speaking he'll deal with in a few verses. But concerning prophets, the saints should first of all not gullibly presume that whatever alleged prophets say is true. The Bereans were commended for such an attitude. "Now the Bereans were of more noble character than the Thessalonians, for they received the message with great eagerness and examined the Scriptures every day to see if what Paul said was true." Acts 17:11"Dear friends, do not believe every spirit, but test the spirits to see whether they are from God, because many false prophets have gone out into the world." 1John 4:1 And what to weigh it against but scripture. Nothing but the Bible is above scrutiny.
But weighing carefully what is said is not limited to evaluating its source - whether it be of the Spirit of God, but also weighing carefully its application. Even concerning the Bible, while we all may acknowledge it is God's Word, to what extent do each of us carefully weigh what is said so as to derive applications relevant to our lives?