How do you catch someone lying?

Most fact-checking tools choose their sources for you. While building FactLens, I kept returning to a harder question: should credibility be universal, expert-curated, community-driven, or personal?

FactLens lets users prioritize sources they trust, block sources they do not, and inspect the evidence behind each verdict.

Which approach would you trust most: curated defaults, complete personal control, transparent source scoring, or a combination? What would make you trust a real-time fact-check while watching a vide.