Whenever you are presenting something to the audience it is crucial that you maintain authenticity. Any facts and figures that is shared must be truthful and backed up by resources and data. Authenticity is needed to prove your credibility. If at any point of time any of the facts given by you turn out to be non-authentic, that can be very risky for your professional life. Authenticity in presentations also make sure that each and every item you are presenting is checked and vetted before presenting in front of the audience. If the audience cross questions you, you have all the tools which you can use to make your point across and satisfy the query of the audience member.