In the dystopian novel Nineteen Eighty-Four by George Orwell, thoughtcrime is the criminal act of holding unspoken beliefs or doubts that oppose or question the ruling party. In the book, the government attempts to control not only the speech and actions, but also the thoughts of its subjects.

Thoughtcrime
Thought & Crime
Thought crime
IAPT and thoughtcrime: language, bureaucracy and the evidence-based regime
Thoughtcrime and the Assault on the Freedom of Expression
Precrime, Facecrime, Thoughtcrime
Thoughtcrime in Britain’s Ascendant Police State
Fredrick Töben Arrested for Thoughtcrime
Thoughtcrime: [Analysis "Problem"no. 20]
ThoughtCrime: Revisionist Historian Suffers Savage Beating
Is Keynesianism now a thoughtcrime?
Punishing "Thoughtcrime": The Reaction to Howard Dean's Passing Remark about the Confederate Flag Offers a Sobering Illustration of ...
Development and Consequences of judicial thought in the early Showa era : ideological foundation of thoughtcriminal probation law, j...