A biologist, a physicist and a mathematician meet on the terrace of a café and see a couple enter the hotel across the street. A few minutes later, the couple leaves the hotel with a child.
The biologist comments: it's clear, they have reproduced.
The physicist: no, it's simpler than that: 2 people entered, 3 left, except for the error of experience, nothing happened.
The mathematician: do you realize it now only takes one person to enter the hotel for it to be empty?
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Snap_Shot_in_Time ago
That is a good joke! Except... We don't know how many people might normally be in the hotel. For example, the hotel clerk, the cleaning staff and maybe other customers.
SerialBrain2 ago
The idea is that the mathematician models the hotel with a population P. Let's suppose N is the number of other people like, as you said, the hotel clerk, the cleaning staff and maybe other customers. Before the couple enters the hotel the population is P1=N+1, when they enter it, it becomes P2=N+3, when they leave P3=N. Therefore, the Delta of the hotel population at the end of the process is P3 - P1 = -1. So? The Delta becomes zero when someone enters the hotel and that is emptiness because the hotel was initially empty... :)
Rainy-Day-Dream ago
stop trying to farm upvoats, voat manipulation is explicitly stated to be unacceptable here
https://voat.co/v/announcements/1639027