What useful practice technique is suggested to force a speaker's brain to rely less on verbatim memory and enable smoother transitions when distracted?

Prepare three distinct opening sentences for every major section of your presentation.

To cultivate adaptation skills rather than relying solely on rote memorization, a practical technique involves preparing three entirely distinct opening sentences for each major segment of the presentation. This method serves to train the speaker's mind to internalize the core concept rather than just the precise wording. By preparing alternatives, the speaker gains the flexibility necessary to pivot seamlessly mid-sentence if an unforeseen distraction occurs or if audience reaction indicates that the original planned opening did not successfully land with listeners.