What are some situations where it may be unclear what would be classified as a reasonable search?

Reasonable search.. if they look high or act it or smell like marijuana, if they act drunk or look like they’re playing it off, look for car scepters and if there is an excessive amount that’s suspicious, if they seem really nervous or keep looking down at something, if the smell of cologne or perfume is extremely strong they could be trying to cover up a scent, etc. i hope that helped