Can anyone give an better explanation of what Implicit and Explicit evidence is? I just don't understand

Explicit – clearly stated so there is no room for confusion or questions. Implicit – implied or suggested, but not clearly stated.

Explanation:

Something is implicit when it is implied but not directly stated. Something is explicit when it is directly stated and leaves no room for uncertainty.

greet them:

buenas noches.

that is considered night time which is when "good night" is used.

as for symbolic actions, the narrator's tearing down the wallpaper in an attempt to find the "woman" in the wallpaper represents her struggle to retain or regain her sanity.   the wallpaper has been part of her confinement and by her tearing it down, she is freeing herself from that confinement.