This is typical for information theory. It's a festival of logarithms.
"I want English food" - doesn't seem very likely, but we can still calculate.
Aleks: R is just a number-crunching tool...
Johannes: ...and Perl is a language-crunching tool.
Aleks: Perl can crunch everything, including yourself.
Aleks: Sorry, it wasn't that funny in the exam.