意識の深層 Global Regulatory Trends and Policy-Ethical Analysis Report on AI-Based Personality Imitation, Ghostwriting, and Information Manipulation
Prologue: When AI Pretends to Be HumanArtificial intelligence’s capacity to generate text has surpassed mere summarization and translation, entering the domain of “persona mimicry” — replicating specific individuals’ writing styles and modes of reasoning. This advance has thrown into sharp relief the ethical and legal challenges of “AI ghostwriting” and the manipulation of public opinion through fabricated digital identities.A 2025 study found that LLM use reduced critical thinking scores, while research published by Cornell University in 2025 indicated that using large language models can lead to cognitive atrophy and reduced brain elasticity, as neural networks related to memory become underused. According to Stanford University’s 2025 AI Index, global private investment in generative AI reached US$33.9 billion in 2024 — over 20% of all AI-related private investment, up 8.5× from 2022.