your “real” audience will have.
if your audience asks you to state a specific data point or definition of something and you are unsure, first talk about what you do know related to the subject. then, let them know that you will get back to them with the best possible answer after your presentation. it’s okay not to have the answer on the spot, but be sure to follow-up afterward.
building in time to practice and prepare for questions, just like you would practice with the contents of your presentation, is a key way to make sure that you are ready and able to provide additional information and examples that your audience 