That would be the Hypothesis.
(It is of course also a proposition).
see link for more words related to debating and argumentation:
Debates start with a proposition or statement
The word used to introduce a formal debate proposition is "resolved."
The side that opposes a proposition is known as the opposition. They are responsible for presenting arguments against the proposition in a debate or discussion.
"Con" is short for "contra" meaning against in a debate. In a debate setting, "con" refers to the position or participant arguing against a specific proposition or resolution.
A proper debate competition is begun by stating the motion(topic) and who is proposing and who is opposing. A chairperson should be present who reads the rules of the debate. He/She can then call the member of the proposition to speak. After the member of prop has spoken, there is a rebuttal round of a specific time period where members of the opposition can put forward there questions.
In a debate, the affirmative side supports the proposition or claim being discussed, advocating for its acceptance and providing evidence to back it up. Conversely, the negative side opposes the proposition, arguing against it and presenting counter-evidence to refute the affirmative's claims. Each side aims to persuade the audience or judges of their position's validity through logical reasoning and effective argumentation. The choice of side often influences the strategies and tactics employed during the debate.
The person going against you in a debate is called the "opponent" or "debate opponent." In formal debate settings, they may also be referred to as the "negative" if they are arguing against the resolution or proposition you are supporting. In some contexts, they might simply be known as the "adversary."
A proposition statement is a clear and specific statement that presents a position or argument on a particular topic. It is used in communication to convey a main idea or thesis, providing a focus for discussion or debate.
A proposition is a statement or idea that is presented for consideration or discussion. It can be a proposal, argument, or assertion put forward for debate or acceptance.
through the collection of empirical data being presented at the start of the debate
She strongly disagreed with the editorial so she quickly wrote a scathing rebuttal.
The word "should" is commonly used in a debate motion or notion, as it signals that a proposition is being made and invites arguments in favor or against a particular course of action.