### Introduction
- "Summarize the main idea behind site reliability engineering (SRE) as described in the text."
- "Explain the historical background of SRE, including its origins and initial mission."

### Key Concepts
- "Define the terms 'site' and 'reliability' in the context of site reliability engineering."
- "Discuss why reliability is considered a critical aspect of software and services."

### Illustrative Examples
- "Provide an example from the text that demonstrates the importance of reliability in services like Gmail."
- "Compare and contrast the significance of features versus reliability using the Gmail example."

### Philosophical Perspectives
- "Analyze the statement 'Reliability is like oxygen' and explain its relevance to site reliability engineering."
- "Explore the philosophical implications of prioritizing reliability over other software properties."

### Practical Implications
- "How can SRE principles be applied to ensure the reliability of a system or service?"
- "Suggest strategies for balancing feature development with reliability improvement."

### Reflection and Discussion
- "Reflect on the idea that reliability is often taken for granted and propose ways to emphasize its importance in a development team."
- "Discuss how SRE has evolved from its initial focus on keeping Google.com operational to its broader scope today."