"""Create reasoning_engine
Generated by Phi-Octopus Eden
2025-11-07 16:21:47.342896
"""

```python
class ReasoningEngine:
    """
    A simple reasoning engine to solve problems with limited reasoning sophistication.
    
    Attributes:
        knowledge_base (dict): Stores facts and rules for reasoning.
        
    Methods:
        add_fact(fact: str) -> None:
            Adds a fact to the knowledge base.
            
        infer(conclusion: str) -> bool:
            Attempts to derive a conclusion from existing facts.
            
        solve(problem: str) -> str or None:
            Solves a problem by attempting to derive a solution from known facts.
    """
    
    def __init__(self):
        self.knowledge_base = {}
        
    def add_fact(self, fact: str) -> None:
        """Adds a fact to the knowledge base."""
        if fact not in self.knowledge_base:
            self.knowledge_base[fact] = True
            print(f"Fact added: {fact}")
    
    def infer(self, conclusion: str) -> bool:
        """Attempts to derive a conclusion from existing facts."""
        for fact in self.knowledge_base.keys():
            if conclusion in fact and all(subfact in fact for subfact in conclusion.split()):
                return True
        return False
    
    def solve(self, problem: str) -> str or None:
        """
        Solves a problem by attempting to derive a solution from known facts.
        
        Args:
            problem (str): The statement that needs to be proven based on existing knowledge.
            
        Returns:
            str: A solved conclusion if the problem can be derived.
            None: If no derivation is possible with current facts.
        """
        print(f"Attempting to solve: {problem}")
        for fact in self.knowledge_base.keys():
            if problem in fact and all(subprob in fact for subprob in problem.split()):
                return f"Solved: {fact}"
        return None


# Example usage
if __name__ == "__main__":
    engine = ReasoningEngine()
    engine.add_fact("All humans are mortal.")
    engine.add_fact("Socrates is a human.")
    
    conclusion = "Socrates is mortal."
    
    result = engine.solve(conclusion)
    if result:
        print(result)
    else:
        print("Problem not solvable with current knowledge.")
```

This Python script introduces a `ReasoningEngine` class designed to handle simple reasoning tasks. It includes methods for adding facts, inferring conclusions, and solving problems based on the provided facts. An example usage is included at the bottom of the code.