Knee joint and elbow joints are examples of ball and socket joint.

Explanation

**Step-by-Step Solution:**

1. **Identify the Type of Joints:**
- The statement claims that knee and elbow joints are examples of ball and socket joints. However, this is incorrect.

2. **Define Hinge Joints:**
- Hinge joints allow movement primarily in one direction, similar to the motion of a door hinge. This means they can flex and extend but cannot rotate.

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