Threat Shutdown
ability to close down arguments before they get out of control to continue a persuasive presentation
Awards
Awards are a trust factor; therefore, if an organization or individual has achieved a widely-recognized and/or credible award, it should prominently publish this fact.
Celebrities & Authority Figures
The power of celebrity in selling has long been established . But you can use images, statements and other content to convey authority figures, such as doctors, nurses, policemen, celebrity chefs and captains of industry so as to reinforce persuasive messages.