Sober vs. Drunk !
The skipper of a tramp steamer, in writing up the log recording an eventful day, rounded off his task with the entry: "Mate intoxicated."
To the mate, who indignantly protested on reading it, the skipper retorted: "Well, it's true, ain't it?"
On the following day it was the mate's duty to write up the log, and he completed his account with "Skipper sober."
The captain stared at it for a moment, then exploded.
"Well, it's true, ain't it?" was the mate's rejoinder!