# B 机制解释层

## 1. Scope

```text
layer_id: B
function: explain how disappointment, expectation, prediction, and isolation interact
primary_nodes: B1, B2
```

本层把问题从“父母导致”转为多因素关系学习与关系预测问题。

## 2. Main Claims

```text
- 失望隔离可能是边界、麻木、防御、撤资，也可能已经泛化。
- 关系预测和期待落差是关键机制，不是单一原生家庭因果。
- 干预需要识别当前主导层级，而不是套用固定解释。
- 家庭长期情感忽视可以是因素之一，但不是唯一因果或道德结论。
```

## 3. Source Material Layer

Primary blocks:

| block_id | role |
| --- | --- |
| R01-B004 | initial viewpoints and multi-factor turn |
| R02-B001 | mechanism round entry |
| R02-B002 | multiple factors and cognitive dissonance |
| R02-B003 | stage-sensitive dominant layer |
| R02-B005 | boundary vs generalized isolation |
| R03-B003 | family neglect as one factor |

Cross-links:

```text
A1: entry label boundary
C1: I-domain positioning
E2: family field as relationship prediction environment
```

## 4. Distortion Guard

Do not reduce this layer to “family is the cause.” It explains relation-learning dynamics and prepares the move into I-domain governance.

## 5. Material Extraction

| material_id | source_blocks | type | extracted material | downstream use |
| --- | --- | --- | --- | --- |
| B-M01 | R01-B004, R02-B002 | mechanism | The source replaces single-cause explanation with multi-factor relation learning: pressure, expectations, experience sampling, cognition, and relationship feedback combine. | mechanism chapter |
| B-M02 | R02-B003 | intervention principle | Dominant layer changes by stage; intervention must track which layer currently controls the problem. | Giant Ark layer-selection rule |
| B-M03 | R02-B005 | differentiation | Isolation may be a legitimate boundary when targeted at high-risk objects, but becomes a problem when generalized across relation types. | boundary vs pathology distinction |
| B-M04 | R03-B003 | factor weighting | Family neglect can be a factor, but the discussion blocks turning it into a moralized single cause. | adolescent/family caveat |
| B-M05 | R07-B006 | relation-prediction bridge | Safety, expectation models, boundaries, self-narrative, and relationship prediction are the psychological materials later modeled in the family field. | bridge to E2 |

## 6. Reusable Claims

```text
- The key variable is not whether disappointment exists, but whether the system has generalized withdrawal beyond the original risk object.
- A relation injury becomes structurally important when it rewrites prediction, expectation, boundary, and self-narrative.
- Family can be high-weight local evidence without becoming a total cause.
```

## 7. Open Use Notes

This layer supplies the mechanism substrate for both Giant Ark and Family Triangle Cognitive Field. It is the best place to preserve nuance before model-building hardens categories.