# Section 13: Pretrigger disturbance belongs to the same ordinary model

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<a id="section-13"></a>

## 13 Pretrigger disturbance belongs to the same ordinary model

 The recoil and auxiliary calculation above supplies the exact ordinary auxiliary estimates, including all clock tails and backreaction. In particular, 

$$

 \epsilon_{\rm pre}\le\frac{t_a^2(400000)}{4M_-^2},\qquad
 I_{\rm pre}\le120K\epsilon_{\rm pre}<6\times10^{-18}.

$$

 Here $I_{\rm pre}$ is expected variation of the isolated rotor's lifted rank along the exact active trajectory. It is not the old source-inclusive logical-current quantity with a substituted constant.

The initial rotor marginal has density at most one because its variation is at most two. Its initial cumulative-rank density is at most two. The $2N$ pulled-back classifier boundaries therefore have actual strip mass at most $8Nr$. With $r=10^{-9}$, 

$$

 \epsilon_{\rm prelabel}
 \le8Nr+\frac{16(6\times10^{-18})}{r}
 =.000002144.

$$

 The first term uses the actual marginal directly; the second uses the derived active domination factor16.