About the fact that our believers are also allowing contradictions in determining primary issues today

On the violation of the criterion for determining the primary issues in our nation

CAVOL: Hello dear teachers. May Allah Ta'ala bless you with the work you have started. My question is, I heard that it is a sin not to accept greetings. Is that right?

One group of people said that "the face should be uncovered when the corpse is placed in the coffin, while another group of people said that the face should be covered." Please clarify this issue.