According to the passage, why are people more likely to tell the truth through certain media of communication?

根据短文，为什么通过某种媒介交流时，人们更可能讲真话？

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Image is an important information source of human intelligence. It is the primary media of communication.

图像是人类智能活动重要的信息来源之一，是人类相互交流和认识世界的主要媒体。

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We become utterly dependent on the two most primitive media of communication: pictures and the spoken word.

我们变得最终依赖于两种最原始的方式交流：画画和讲话。

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In 2010, it opened a social-media university where employees learn the basics of social media communication.

FORBES: 36. Dell

The package missed the real news, which is that the underlying technologies of social media are transforming the nature of commerce, communication, collaboration, entertainment and media.

FORBES: Bubble Deflated, Social Media Will Now Change the World

The media represents channels of communication that can reach millions of people across the nation.

CNN: Understanding The Role of the Media