"""Create reasoning_engine
Generated by Phi-Octopus Eden
2025-11-06 21:15:41.835042
"""

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

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

    def add_fact(self, fact: str, value: Any) -> None:
        """Add a fact to the knowledge base."""
        self.knowledge[fact] = value

    def get_fact(self, fact: str) -> Any:
        """Retrieve a fact from the knowledge base."""
        return self.knowledge.get(fact)

def reasoning_engine(knowledge_base: KnowledgeBase) -> Dict[str, Any]:
    """
    A simple reasoning engine that deduces new facts based on existing ones.
    
    Args:
        knowledge_base (KnowledgeBase): The knowledge base to reason about.

    Returns:
        Dict[str, Any]: A dictionary of deduced facts and their values.
    """
    # Example problem: Given a set of facts, deduce the sum of two numbers if they are present
    deduced_facts = {}
    
    def check_and_deduce(x_fact: str, y_fact: str) -> None:
        x_val = knowledge_base.get_fact(x_fact)
        y_val = knowledge_base.get_fact(y_fact)
        
        if x_val is not None and y_val is not None and isinstance(x_val, int) and isinstance(y_val, int):
            deduced_facts[f"x + y"] = x_val + y_val
    
    # Example facts
    knowledge_base.add_fact("x", 5)
    knowledge_base.add_fact("y", 10)
    
    check_and_deduce("x", "y")
    
    return deduced_facts

# Example usage
kb = KnowledgeBase()
result = reasoning_engine(kb)
print(result)  # Output: {'x + y': 15}
```