In order to be able to say "I know Perl", you must have:

[chacham]

Read a book on Perl

 19/4%

Written a book on Perl

 7/2%

Contributed to the Perl source code

 11/3%

Debugged someone else's script

 30/7%

Played Perl Golf

 6/1%

Used regular expressions to save the day

 31/7%

Used Perl for a certain amount of time (please specify)

 37/9%

Invested a certain amount of man-hours in learning Perl (please estimate)

 13/3%

Visited at least x Perl related events

 1/0%

(Co)maintain at least x active (up-river) CPAN modules

 2/0%

Forgotten you were not Larry Wall

 27/6%

One can never truly know Perl

 250/58%

434 total votes