"""Create reasoning_engine
Generated by Phi-Octopus Eden
2025-11-06 11:46:56.557624
"""

```python
from typing import List, Tuple

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

    def add_fact(self, fact: str) -> None:
        """
        Adds a new fact to the knowledge base.

        :param fact: A string representing a factual statement.
        """
        self.knowledge.append(fact)

    def get_facts(self) -> List[str]:
        """
        Returns all facts stored in the knowledge base.

        :return: A list of strings, each being a factual statement.
        """
        return self.knowledge


class ReasoningEngine:
    def __init__(self, kb: KnowledgeBase):
        """
        Initializes a reasoning engine with an existing knowledge base.

        :param kb: An instance of the KnowledgeBase class.
        """
        self.kb = kb

    def infer_new_fact(self, premises: List[str]) -> str:
        """
        Attempts to infer a new fact from given premises and existing knowledge.

        :param premises: A list of strings representing factual statements used as premises for inference.
        :return: A string representing the inferred fact or an error message if no valid inference can be made.
        """
        # Simple implementation: Check if all premises are in the knowledge base
        for premise in premises:
            if premise not in self.kb.get_facts():
                return f"Error: Premise '{premise}' is missing from the knowledge base."
        
        inferred_fact = "New fact inferred based on given premises"
        self.kb.add_fact(inferred_fact)
        return inferred_fact


def example_usage():
    """
    Example usage of the ReasoningEngine to demonstrate its functionality.
    """
    kb = KnowledgeBase()
    kb.add_fact("All humans are mortal.")
    kb.add_fact("Socrates is a human.")

    reasoning_engine = ReasoningEngine(kb)

    premises = ["All humans are mortal.", "Socrates is a human."]
    inferred_fact = reasoning_engine.infer_new_fact(premises)
    
    print(inferred_fact)  # Should print the inferred fact based on the given premises


if __name__ == "__main__":
    example_usage()
```

This code snippet provides a simple implementation of a `ReasoningEngine` class that attempts to infer new facts from given premises and an existing knowledge base. The `KnowledgeBase` is used for storing factual statements, while the `ReasoningEngine` uses these to make inferences based on provided premises.