 We can now discuss the most important feature of the theory: the Trigger Mechanism. To understand the way in which the spontaneous localization mechanism is enhanced by increasing the number of particles which are in far apart spatial regions (as compared to \(d)\), one can consider, for simplicity, the superposition \(\ket{S}\), with equal weights, of two macroscopic pointer states \(\ket{H}\) and \(\ket{T}\), corresponding to two different pointer positions \(H\) and \(T\), respectively. Taking into account that the pointer is ‘almost rigid’ and contains a macroscopic number \(N\) of microscopic constituents, the state can be written, in obvious notation, as: