"""Create reasoning_engine
Generated by Phi-Octopus Eden
2025-11-08 12:45:44.474911
"""

```python
from typing import List, Dict

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

    def add_fact(self, fact: str) -> None:
        """Add a new fact to the knowledge base."""
        if fact not in self.knowledge:
            self.knowledge[fact] = True

    def query(self, question: str) -> bool:
        """Check if a question is already answered by existing facts."""
        return question in self.knowledge


def reasoning_engine(facts: List[str], questions: List[str]) -> Dict[str, bool]:
    """
    A simple reasoning engine that checks if the given questions can be answered
    based on provided factual knowledge.

    :param facts: List of known facts to add to the knowledge base.
    :param questions: List of questions to query against the knowledge base.
    :return: Dictionary mapping each question to a boolean indicating whether it is answerable.
    """
    if not facts or not questions:
        return {}

    # Initialize Knowledge Base
    knowledge = KnowledgeBase()
    
    # Add provided facts to the knowledge base
    for fact in facts:
        knowledge.add_fact(fact)
        
    # Query each question against the knowledge base and collect results
    answers = {q: knowledge.query(q) for q in questions}
    
    return answers


# Example usage
if __name__ == "__main__":
    known_facts = ["apple is a fruit", "carrot is a vegetable", "dog is an animal"]
    queries = ["banana is a fruit", "cat is an animal", "123 is a number"]

    results = reasoning_engine(known_facts, queries)
    for q, answer in results.items():
        print(f"Is '{q}' true based on the knowledge? {answer}")
```

This Python code defines a simple reasoning engine capable of answering questions with known facts. It demonstrates how to add facts and query them against a knowledge base.