To oversimplify, it’s a metaphor about what it’s like to go through life relying only on your senses and not using reason to question or analyze the deeper meanings behind your surface impressions. The story goes on to discuss a prisoner who escapes the cave and gets a taste of true reality, that prisoner is meant to represent a philosopher. When the escaped prisoner returns and tells the others of what he’s seen, they reject his claims saying how absurd it would be to believe that there’s anything more than just the shadows. I think in this day and age it’s easy to guess what that interaction represents, but Plato had a particular bone to pick about this since his mentor had essentially been executed for questioning various things.
https://en.wikipedia.org/wiki/Allegory_of_the_cave?wprov=sfla1
Or just revise the law to state that international copyrights will only be enforced if they are held by Canadian trading partners in good standing, and that the only prosecutable violations of those copyrights are those which have taken place during the most recent contiguous period that that partner has been in good standing.
That way we don’t need to keep updating the law every time a trading partner starts/stops acting up, and other trading partners won’t need to worry about impacts to their IP. It will simply be baked in that every time a trading partner unilaterally breaks a trade agreement with us they will in effect be granting amnesty to every Canadian citizen who ever breached their copyright in the past and creating an open season on their IP within Canada until they can reach a new mutually acceptable trade agreement. Honestly this should be a standard practice for many countries.