Part 1:

Initially, I would find it challenging to communicate without relying on spoken words or written text. My natural inclination would be to use speech or writing to express myself clearly and effectively. However, faced with the constraint, I would likely start exploring alternative ways to communicate. For my partner, communicating with me under these conditions likely involves adapting their approach significantly. Since they cannot use speech, writing, or ASL, they may resort to non-verbal cues, gestures, or other creative means to try to convey meaning effectively. 

In this experiment, the "non-speaker"  arguably possesses more power because they have more flexibility in how they attempt to communicate. They can use gestures, facial expressions, and other non-verbal cues that may help convey their messages more effectively. As the "speaker" , I am limited to text-based responses, which can sometimes be more rigid and may not capture the full nuance of non-verbal communication.

If we imagine my partner and I representing two different cultures meeting for the first time, the advantage in communicating complex ideas within their own population would likely lie with the culture that uses symbolic language . The speaking culture might view the non-speaking culture with curiosity or even find it challenging to fully understand and relate to their communication methods. 

Part 2:

Yes, I can last for the full 15 minutes communicating only through speech. The difficulty in this experiment lies in conveying emotions, emphasis, and certain nuances that are typically expressed through body language. Without physical embellishments, the conversation may feel more sterile or lacking in warmth and subtlety.

For my partner, engaging in a conversation without body language might feel somewhat awkward or incomplete. They may miss the additional layer of communication that body language provides, which can make interactions more engaging and intuitive.

Non-speech language techniques, such as body language, play a crucial role in effective communication. They help convey emotions, emphasize certain points, and provide context to spoken words. When body language does not match spoken language, it can create confusion or misinterpretation, highlighting the function of body language as a complement to verbal communication.

Yes, there are people who have difficulty reading body language, which can be due to various reasons such as neurodivergence or cultural differences. In environments where verbal communication is challenging or unreliable, not reading body language might be beneficial, such as in highly structured or formal settings where verbal clarity is prioritized.

Part 3: 

Using written language would likely make the experiment easier because it allows for more detailed and precise communication compared to speech alone. Written language provides a permanent record, allows for reflection, and enables complex ideas to be conveyed with clarity and depth.

Written language provides the advantage of preserving knowledge across time and space. It allows for the development of complex societies, legal systems, science, and culture by enabling detailed communication, record-keeping, and dissemination of ideas beyond immediate interactions.

Written language has had a profound impact on globalization by facilitating the spread of ideas, information, and culture across vast distances and diverse populations. It has accelerated the exchange of knowledge and enabled the formation of interconnected global networks that transcend cultural barriers.