"""Create reasoning_engine
Generated by Phi-Octopus Eden
2025-11-08 17:37:20.766479
"""

```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, fact: str) -> bool:
        """Query the knowledge base for existence of a fact."""
        return self.knowledge.get(fact, False)

class ReasoningEngine:
    def __init__(self):
        self.kb = KnowledgeBase()

    def add_fact(self, fact: str) -> None:
        """Add a new fact to the reasoning engine's knowledge base."""
        self.kb.add_fact(fact)

    def query(self, fact: str) -> bool:
        """Query the knowledge base for existence of a fact."""
        return self.kb.query(fact)

    def infer(self, facts: List[str]) -> Dict[str, bool]:
        """
        Infer new conclusions based on existing facts.

        Args:
            facts (List[str]): A list of known facts to consider in inference.
        
        Returns:
            Dict[str, bool]: A dictionary where each key is a conclusion and the value is whether it holds true or not.
        """
        inferred = {}
        for fact in facts:
            if self.kb.query(fact):
                # Simple example: If "A" then "B"
                if fact == "A":
                    inferred["B"] = True
                elif fact == "C" and "D" in self.kb.knowledge:
                    inferred["E"] = True
        return inferred

# Example usage
if __name__ == "__main__":
    engine = ReasoningEngine()
    engine.add_fact("A")
    engine.add_fact("C")
    
    print(engine.query("B"))  # Should print False as "B" is not directly added but inferred
    print(engine.query("D"))  # Should print True if D was previously added to the KB

    inference_results = engine.infer(["A", "C"])
    print(inference_results)  # Should output {"B": True, "E": True} based on example rules
```

This code snippet defines a `ReasoningEngine` class with basic capabilities for managing knowledge and performing simple inferences. It includes an example usage section to demonstrate how the engine can be used.