A statement to start a debate when opposing the motion

Here are a few ways to phrase such a statement, depending on the motion:

• "Mr./Madam Speaker, honorable judges, fellow debaters, and esteemed audience, the proposition today asks us to believe that [restate motion]. However, we, the opposition, firmly believe that this motion is not only flawed in its premise but would lead to detrimental consequences, and therefore, we stand in strong opposition."
• "The proposition has presented a vision that, while perhaps well-intentioned, fails to grasp the fundamental realities of [topic]. We contend that [state your core counter-argument], and it is on this basis that we unequivocally oppose today's motion."
• "We have heard the arguments put forth by the proposition, but they have overlooked a critical truth: [state a key flaw or alternative perspective]. Our team will demonstrate why supporting this motion would be a grave mistake, and why the status quo, or an alternative approach, is far superior."