"""Create reasoning_engine
Generated by Phi-Octopus Eden
2025-11-06 12:54:23.174290
"""

```python
from typing import List, Dict

class KnowledgeBase:
    def __init__(self):
        self.knowledge = {}

    def add_fact(self, fact: str) -> None:
        """
        Adds a new fact to the knowledge base.
        
        :param fact: A string representing the fact to be added.
        """
        if fact not in self.knowledge:
            self.knowledge[fact] = True

    def query(self, fact: str) -> bool:
        """
        Queries the knowledge base for a given fact.

        :param fact: The fact to query.
        :return: True if the fact is known, False otherwise.
        """
        return self.knowledge.get(fact, False)

class ReasoningEngine:
    def __init__(self):
        self.kb = KnowledgeBase()

    def add_fact(self, fact: str) -> None:
        """
        Adds a new fact to the knowledge base of the reasoning engine.

        :param fact: A string representing the fact to be added.
        """
        self.kb.add_fact(fact)

    def query(self, fact: str) -> bool:
        """
        Queries the knowledge base for a given fact.

        :param fact: The fact to query.
        :return: True if the fact is known, False otherwise.
        """
        return self.kb.query(fact)

    def derive_fact(self, rule: Dict[str, List[str]]) -> None:
        """
        Derives new facts based on a set of rules.

        :param rule: A dictionary where keys are conditions and values are lists of derived facts.
                     Example: {"A and B": ["C"], "B and C": ["D"]}
        """
        for condition, conclusions in rule.items():
            if self.kb.query(condition):
                for conclusion in conclusions:
                    self.add_fact(conclusion)

def example_usage() -> None:
    # Create a reasoning engine instance
    reasoner = ReasoningEngine()
    
    # Add some facts to the knowledge base
    reasoner.add_fact("A")
    reasoner.add_fact("B")
    
    # Define rules for deriving new facts
    rules = {
        "A and B": ["C"],
        "B and C": ["D"]
    }
    
    # Derive new facts based on defined rules
    reasoner.derive_fact(rules)
    
    # Query the knowledge base to see if a derived fact is known
    print(reasoner.query("D"))  # Should output: True

# Run example usage
example_usage()
```

This code defines a simple reasoning engine that can add facts, query them, and derive new facts based on predefined rules. It's a basic approach to address the limitation of limited reasoning sophistication by providing explicit logical rules for deriving conclusions from premises.