"""Create reasoning_engine
Generated by Phi-Octopus Eden
2025-11-06 22:29:31.979914
"""

```python
from typing import List, Dict

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

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

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


def reasoning_engine(kb: KnowledgeBase) -> Dict[str, bool]:
    """
    Simple reasoning engine that checks if a conclusion can be drawn
    based on the given knowledge base.

    Args:
        kb (KnowledgeBase): The knowledge base containing known facts.

    Returns:
        Dict[str, bool]: A dictionary where keys are conclusions and values indicate validity.
    """
    conclusions = {
        "All birds can fly": False,
        "Elephants cannot fly": True
    }

    for fact in kb.get_knowledge():
        if "birds" in fact and "fly" in fact:
            conclusions["All birds can fly"] = True

        if "elephants" in fact and "fly" not in fact:
            conclusions["Elephants cannot fly"] = True

    return conclusions


# Example usage
if __name__ == "__main__":
    kb = KnowledgeBase()
    kb.add_knowledge("Birds have wings")
    kb.add_knowledge("Penguins are birds but they do not fly")
    kb.add_knowledge("Elephants do not have wings")

    engine_output = reasoning_engine(kb)
    for conclusion, is_valid in engine_output.items():
        print(f"{conclusion}: {is_valid}")
```

This code defines a simple reasoning engine that takes a knowledge base and checks if certain conclusions can be drawn based on the facts stored.