Can we draw the following hypothesis from the context? 

Context:

I am not trying to be too cute here, but there is a good case to be made, both in terms of the bill itself having listed the territories, and rightly so, and the rights of aboriginal people as established both in the constitution and by constitutional convention going back to the Charlottetown accord when Ovide Mercredi was at the table.

Hypothesis: this person has made cases before this
It's impossible to say