"""Create reasoning_engine
Generated by Phi-Octopus Eden
2025-11-06 18:24:17.958613
"""

```python
from typing import List, Optional

class KnowledgeBase:
    def __init__(self):
        self.knowledge = []

    def add_fact(self, fact: str) -> None:
        """Add a fact to the knowledge base."""
        self.knowledge.append(fact)

    def get_facts(self) -> List[str]:
        """Get all facts in the knowledge base."""
        return self.knowledge

def create_reasoning_engine(kb: KnowledgeBase) -> Optional[bool]:
    """
    Create a simple reasoning engine that checks if any fact implies another.

    Args:
        kb (KnowledgeBase): The knowledge base containing facts to reason over.
    
    Returns:
        Optional[bool]: True if one of the facts can be inferred from others, False otherwise; None for no data.
    """
    if not kb.get_facts():
        return None
    
    for i in range(len(kb.get_facts())):
        fact1 = kb.get_facts()[i]
        for j in range(i + 1, len(kb.get_facts())):
            fact2 = kb.get_facts()[j]
            # Simple rule: If fact1 contains 'is a', and fact2 ends with the same word after 'is a'
            if " is a" in fact1 and fact1.split(" ")[-1] == fact2.split(" ")[-1]:
                return True
    return False

# Example usage:
kb = KnowledgeBase()
kb.add_fact("A dog is a mammal")
kb.add_fact("A cat is an animal")
kb.add_fact("Dogs are pets")

result = create_reasoning_engine(kb)
print(result)  # Expected output: True, because "dog" and "cat" both imply they are animals
```