I believe the person you are replying to is using that as an allusion to the issues discussed in the famous "Reflections on Trusting Trust" paper[1] by Ken Thom

I believe the person you are replying to is using that as an allusion to the issues discussed in the famous "Reflections on Trusting Trust" paper[1] by Ken Thompson. [1]: https://www.cs.cmu.edu/~rdriley/487/papers/Thompson_1984_ReflectionsonTrustingTrust.pdf https://www.cs.cmu.edu/~rdriley/487/papers/Thompson_1984_Ref...