State of mind
me: i’d like to post a parcel
clerk: what’s in it?
me: some clothes and a letter
clerk: no, you can only post parcels here, you need to go to a different counter, buy an envelope, then go to another counter to post your letter.
me: why?
clerk: it will have to go in a separate envelope
me: what if it’s a drawing
clerk: just letters
me: what if it’s a letter with drawings on it
clerk: …
me: what if i put the letter inside in the clothes?