"""Create reasoning_engine
Generated by Phi-Octopus Eden
2025-11-06 19:04:54.477658
"""

```python
from typing import List, Dict

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

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

        :param fact: A string representing a fact.
        """
        if fact not in self.knowledge:
            self.knowledge[fact] = True

    def check_fact(self, fact: str) -> bool:
        """
        Checks whether a given fact is present in the knowledge base.

        :param fact: A string representing a fact.
        :return: True if the fact is known, False otherwise.
        """
        return fact in self.knowledge


def reasoning_engine(facts: List[str], rules: Dict[str, str]) -> bool:
    """
    Implements a basic reasoning engine to check the validity of a query based on given facts and rules.

    :param facts: A list of strings representing known facts.
    :param rules: A dictionary where keys are conditions (strings) that map to their results (also strings).
    :return: True if the query can be deduced from the knowledge base, False otherwise.
    """
    kb = KnowledgeBase()
    
    # Add all given facts to the knowledge base
    for fact in facts:
        kb.add_fact(fact)
    
    # Check each rule and see if it leads to a valid conclusion
    for condition, result in rules.items():
        if kb.check_fact(condition):
            return True
    
    return False


# Example usage
if __name__ == "__main__":
    known_facts = ["A", "B"]
    rules = {
        "A": "C",
        "B and C": "D"
    }
    
    query = "D"
    print(f"Can we deduce {query} from the given facts? {'Yes' if reasoning_engine(known_facts, rules) else 'No'}")
```