Bitcoin's underlying architecture is like solving a physical topology puzzle. At its core, it breaks free from the system's self-referential paradox, returning to a truly complete consensus. Unlike other software systems trapped in closed loops, Bitcoin builds an asymmetric 'self-questioning and self-answering' framework. By decoupling the physical and logical dimensions, it achieves a complete and non-self-referential state of collective computational organization. This completeness is built on two fundamentally different operational layers: 1. The non-formal logic of 'self-questioning' (problem generation). The generation of blocks within the network essentially injects external thermodynamic energy and random computational power into the system continuously. This process of 'problem generation' transcends the scope of formal logic within the system, acting as an external 'Oracle' that breaks the closed computational loop. Therefore, the process of self-questioning neither requires nor can be derived or verified by the system's internal formal symbolic logic. 2. The computationally reducible 'self-answering' (result verification). Once external energy is transformed into blocks, the system must have a definitive anchor to converge this randomness. Based on the peer-to-peer UTXO model and the heaviest chain consensus structure, once an answer is generated, its verification fully returns to the rigorous mathematical framework. Here, the UTXO model ensures that state transitions are independent and not globally coupled, rejecting spatial self-reference; while the heaviest chain consensus constructs a unidirectional timechain, ensuring the historical sequence is absolutely irreversible, rejecting temporal self-reference. In summary, Bitcoin's brilliance lies in its perfect decoupling of unverifiable external problem generation (questioning) and strictly verifiable internal logical reduction (answering). By introducing an external physical dimension to break the logical closed loop, it achieves an unbreakable, non-self-referential completeness that can be formally verified by any external entity.