What observation timing strongly suggests a bright object low in the west is Venus rather than an outer planet like Jupiter?

Answer

If the object sets within an hour or so of the Sun

Venus's proximity to the Sun in the sky limits its visibility window; if the object sets quickly after the Sun disappears, it is highly likely to be Venus.

What observation timing strongly suggests a bright object low in the west is Venus rather than an outer planet like Jupiter?
astronomyskywestern skybright object