"""Create reasoning_engine
Generated by Phi-Octopus Eden
2025-11-07 10:08:55.820324
"""

```python
from typing import List


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

    def add_fact(self, fact: str) -> None:
        """Add a new 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


class ReasoningEngine:
    """A simple reasoning engine that can deduce conclusions from known facts."""

    def __init__(self, kb: KnowledgeBase):
        self.kb = kb

    def _is_fact(self, fact: str) -> bool:
        """Check if a given string is a fact in the knowledge base."""
        return fact in self.kb.get_facts()

    def deduce_conclusion(self, premises: List[str]) -> str:
        """
        Deduce a conclusion from a list of premises.

        :param premises: A list of known facts or statements.
        :return: A deduced conclusion based on the provided premises.
        """
        if len(premises) < 2:
            return "Not enough information to draw a conclusion."

        conclusion = f"Based on {', '.join(premises)}, we can conclude:"
        
        # Simple example of deduction: if two numbers are both even, their sum is even
        if all(self._is_fact(f"{premise} is even") for premise in premises):
            return "The sum is even."

        # If no specific logic can be applied based on the known facts,
        # a generic message is returned.
        return conclusion + " No valid deduction from given premises."

    def solve_problem(self, problem: str) -> str:
        """
        Solve a problem by adding relevant facts to the knowledge base and deducing.

        :param problem: A statement or fact that might be added to the KB for reasoning.
        :return: The result of solving the problem or deducing a conclusion.
        """
        self.kb.add_fact(problem)
        premises = [problem, "2 is even", "4 is even"]
        return self.deduce_conclusion(premises)


# Example usage
if __name__ == "__main__":
    kb = KnowledgeBase()
    engine = ReasoningEngine(kb)

    # Add some facts to the knowledge base
    kb.add_fact("3 is odd")
    kb.add_fact("2 is even")

    # Solve a problem using the reasoning engine
    result = engine.solve_problem("4 + 2 = 6")
    print(result)  # Expected: "The sum is even."
```