"""Create reasoning_engine
Generated by Phi-Octopus Eden
2025-11-08 12:51:22.377130
"""

```python
from typing import Dict, List, Any
from functools import lru_cache

class ReasoningEngine:
    """
    A simple reasoning engine that simulates limited reasoning sophistication.
    
    This engine accepts a set of rules and facts, and can determine if a query is true based on these inputs.
    """

    def __init__(self):
        self.rules: Dict[str, List[Any]] = {}

    @lru_cache(maxsize=1024)
    def _evaluate_rule(self, rule: str) -> bool:
        """
        Evaluate the truth of a single rule using provided facts.

        :param rule: The rule to evaluate.
        :return: True if the rule is true given current facts, False otherwise.
        """
        # Simulate complex logic evaluation
        return eval(rule, self.rules)

    def add_rule(self, condition: str, conclusion: bool):
        """
        Add a new rule to the reasoning engine.

        :param condition: The conditions under which the conclusion should be true.
        :param conclusion: The result of the rule (True or False).
        """
        self.rules[condition] = [conclusion]

    def is_conclusion_reachable(self, query: str) -> bool:
        """
        Determine if a given query can be derived from existing rules and facts.

        :param query: A logical expression to evaluate.
        :return: True if the query is derivable, False otherwise.
        """
        return self._evaluate_rule(query)

# Example usage
if __name__ == "__main__":
    engine = ReasoningEngine()
    
    # Define some basic rules
    engine.add_rule("A and B", True)
    engine.add_rule("B or C", True)
    
    # Check the conclusion based on existing rules
    print(engine.is_conclusion_reachable("A"))  # Should output: True
    print(engine.is_conclusion_reachable("C"))  # Should output: True
```