Core Insight: Memory technology reveals identity as dynamic process rather than static essence, forcing recognition that continuity we experience as self is ongoing reconstruction vulnerable to technological intervention.

Unresolved Questions:

• Can personal identity survive radical memory discontinuity, or does memory editing create new persons who replace the old?
• Should individuals have unlimited authority to modify their own memories when such modifications alter the person who granted consent?
• How do legal systems maintain accountability when memory technology breaks assumed continuity between action and current psychological state?

Core Insight: Megastructures function best as thought experiments forcing examination of civilizational goals rather than as engineering blueprints, with distributed incremental development likely more practical than spectacular monolithic projects.

Unresolved Questions:

• Would advanced civilizations actually build stellar-scale megastructures or achieve their goals more efficiently through other means?
• Can any civilization maintain coherent purpose across the timescales required for megastructure construction spanning millennia?
• Does the absence of detected megastructures indicate they're rarely built, or that our detection methods are insufficient?

Core Insight: The simulation hypothesis may be empirically undecidable because any evidence could be interpreted either as simulation artifacts or as revealing previously unknown physics, forcing recognition of fundamental limits on knowledge about reality's substrate.

Unresolved Questions:

• Can we distinguish simulation artifacts from natural physical phenomena when sophisticated simulators would anticipate and patch detection methods?
• Does consciousness emerging from computational substrate have the same moral status as biological consciousness, or does substrate matter for ethical weight?
• Should we treat unfalsifiable hypotheses seriously when they raise important questions about reality, or limit investigation to testable claims?

Core Insight: Alternative economic systems in fiction work best when treating coordination as genuine technical problem rather than ideological preference, suggesting hybrid approaches for different domains rather than universal replacements.

Unresolved Questions:

• Can coordination mechanisms scale beyond markets and planning without reintroducing their essential features under different names?
• Are some economic alternatives viable only as complete systems, making incremental experimentation impossible or misleading?
• Does material abundance eliminate coordination problems or merely transform which aspects of economic life require coordination?

Core Insight: As destructive capability distributes more widely, defense faces impossible mathematics: perfect success required against unlimited attempts, suggesting civilization may become fundamentally unstable beyond certain technology thresholds.

Unresolved Questions:

• Can defensive capacity scale to match distributed offensive capability, or does technology inevitably favor attackers?
• Is there a capability threshold beyond which organized civilization becomes impossible without authoritarian control?
• Should humanity attempt to limit certain research directions even when enforcement requires surveillance infrastructure with its own risks?

Core Insight: Substrate transfer forces confrontation with whether we are patterns of information or irreducibly embodied consciousnesses, a question that may be empirically undecidable yet determines whether upload is immortality or elaborate suicide.

Unresolved Questions:

• Does consciousness require specific biological architecture or can it genuinely persist across arbitrary computational substrates implementing equivalent information processing?
• Would gradual neuron-by-neuron replacement preserve identity better than wholesale transfer, or does both face the same continuity problem?
• Can uploaded minds maintain recognizably human psychology when freed from biological constraints, or does substrate shape consciousness too fundamentally for human experience to survive transfer?

Core Insight: Meaning requires continuity of interpretation; break that chain and only mute physical forms remain, forcing recognition that our thoughts and values might be completely irrecoverable to far-future archaeologists.

Unresolved Questions:

• Can we distinguish between alien artifacts designed according to unfamiliar principles and natural phenomena when we lack contextual frameworks?
• Would finding multiple extinct civilizations indicate common existential filters that threaten all technological species including humanity?
• Can messages designed for deep-time communication remain interpretable across total cultural and biological discontinuity with their creators?

Core Insight: First contact's central challenge is not technical signal detection but establishing shared reference points for meaning-making across potentially unbridgeable cognitive difference.

Unresolved Questions:

• Can mathematical universality bridge the gap from pattern recognition to semantic communication about intentions and values?
• Would we recognize alien communication attempts that operate on non-linguistic principles or incompatible timescales?
• Should humanity coordinate responses to contact centrally or accept that our fractious nature will produce chaotic first impressions?

Core Insight: Transhumanism forces recognition that we don't understand consciousness well enough to guarantee its preservation through enhancement, yet competitive pressure may drive transformation regardless of this uncertainty.

Unresolved Questions:

• Can identity genuinely persist through changes that alter processing speed, cognitive architecture, and subjective experience beyond recognition?
• Does consciousness serve functional purposes that make it optimization-resistant, or will enhanced intelligence eliminate subjective experience as inefficient overhead?
• Will competitive pressure force universal enhancement regardless of individual preference, or can society create viable niches for unenhanced humans?

Core Insight: The dark forest hypothesis represents rigorous strategic extrapolation under cosmic uncertainty: when verifying intent is impossible and mistakes are extinction-level, silence becomes rational regardless of how lonely it makes the universe.

Unresolved Questions:

• Can civilizations develop trust protocols that enable cooperation without creating fatal vulnerability through information disclosure?
• Does humanity's electromagnetic leakage already doom us, making additional caution about active transmission meaningless?
• At what capability level does the dark forest logic break down because power differentials make conventional threats irrelevant?

Core Insight: Generation ships make explicit the intergenerational consent problem implicit in all long-term projects: no generation can legitimately bind successors to inherited purposes without preserving their autonomy to change course.

Unresolved Questions:

• Can intermediate generations find meaningful existence serving as instrumental links toward goals they'll never experience?
• Does genuine necessity for species survival justify constraining future generations' fundamental choices about existence?
• Should generation ships preserve maximum flexibility for course changes even when this compromises mission probability?

Core Insight: Alignment may be fundamentally unsolvable beyond certain capability thresholds because human values resist coherent specification, suggesting the real insight from alignment research is recognizing limits rather than finding solutions.

Unresolved Questions:

• Can alignment be maintained as systems approach and exceed human-level general capability?
• Is consciousness orthogonal to alignment or does subjective experience create irreducible misalignment risk?
• Should alignment impossibility proofs guide whether to build certain systems rather than how to build them safely?

Core Insight: Post-scarcity's primary challenge is political rather than technical—we possess the capability for material abundance but face institutional resistance to distribution systems that would realize it.

Unresolved Questions:

• Can coordination mechanisms scale to physical production without reintroducing markets or centralized planning?
• Does eliminating material scarcity create meaning crisis or liberation from artificial productivity demands?
• Will automation augment human autonomy or concentrate control in whoever manages production infrastructure?

Core Insight: Mars colonization narratives function less as practical blueprints than as thought experiments forcing examination of planetary-scale transformation, democratic legitimacy across generations, and whether place can shape new political possibilities.

Unresolved Questions:

• Can Mars colonies achieve genuine independence within timescales that make them useful for species redundancy?
• Does terraforming destroy irreplaceable planetary archives even when no indigenous life exists?
• How do societies transition from survival authoritarianism to democratic governance on hostile worlds?

Core Insight: The hard-soft distinction functions best as descriptive shorthand indicating focus rather than value judgment, with the most successful SF integrating rigorous treatment of both physical constraints and social contingencies.

Unresolved Questions:

• Does hard SF genuinely influence technological development or merely reflect existing engineering inclinations?
• Can SF achieve equal rigor across both physical and social extrapolation simultaneously?
• Should genre taxonomy evolve beyond hard-soft to capture more nuanced methodological differences?