A character becomes dangerous not when they lie, but when they become the last person in the room still using the old map. The philosopher of science Imre Lakatos described how scientific research programs protect their core assumptions from falsification by building a 'protective belt' of auxiliary hypotheses — small adjustments that absorb anomalies and keep the central belief intact. People do this too, invisibly and continuously. Your thriller's most unsettling figure might not be the one who deceives others, but the one who has constructed an elaborate architecture of perfectly reasonable-sounding reasons why the evidence keeps being wrong. The horror of that character is that their logic is airtight. Every new fact gets absorbed and neutralized before it can touch the core. They're not lying. They're inoculated against truth — and that's a fundamentally different kind of threat to write.

What would someone observing your current creative project say you keep explaining away rather than confronting directly?

Drawing from Philosophy of Science — Imre Lakatos (The Methodology of Scientific Research Programmes, 1978)