Can a layman give Fatwa regarding an issue whose evidence he knows?

Can a layman give Fatwa regarding an issue whose evidence he knows?

(Ibn Qayyim in إعلام الموقعين عن رب العالمين 4/152 )

1. It is permissible If the laymen has knowledge of the ruling as it happened with its evidence like that of a scholar. And the scholar is better than the laymen because of ability to prove it’s evidence and defend it, that is an extra in knowing the truth with its evidence.

2. It is impermissible for the laymen in all cases due to inability to extract the ruling, no knowledge of its conditions and what goes against it, and perhaps the laymen thinks something is an evidence when it isn’t an evidence.

3. It is permissible for the laymen to give a fatwa if the evidence for the ruling is from the Quran and Sunnah but if it is other than them then it isn’t permissible, because the Quran and Sunnah is speaking to all people, and it is obligatory on all to act upon what has reached them from the Quran and Sunnah, and it is permissible for them to guide others towards it.

Summary: Laymen giving out a fatwa on certain issues that they have knowledge in is a matter of differences of opinion among the scholars as clearly laid out by Ibn Al-Qayyim.