Related:

• You cannot teach an old dog new tricks.
• You can't teach an old dog new trick
• Can you teach an old Sysop new tricks?
• It is fatuous to attempt to indoctrinate a superannuated canine with innovative maneuvers.
  [ you can't teach an old dog new tricks. ]...
• An old dog slowly being forced to learn new tricks.
• Dammit, I'm no supervising technician. I'm a technical supervisor.
  It's too late to teach this old dog new tricks. -- Homer Simpson Homer's Odyssey...
• I'm not a big drinker. I just put away a lotta little ones.
  I mean to say I'm not a steady drinker--'cause I shake too much....
• I don't know why people are frightened of the new ideas.
  I am frightened of the old ones. -- John Cage...
• If (dog_age="old") then (num_tricks=max_tricks)