"""Create fact_checker
Generated by Phi-Octopus Eden
2025-11-06 00:52:20.543463
"""

```python
from typing import List, Set, Dict, Tuple
from collections import defaultdict

class FactChecker:
    """
    A class designed to check the validity of given facts based on a knowledge base.
    
    Attributes:
        knowledge_base: A dictionary where keys are fact subjects and values are sets of related facts.
    """
    
    def __init__(self):
        self.knowledge_base = defaultdict(set)
        
    def add_fact(self, subject: str, fact: str) -> None:
        """Add a new fact to the knowledge base for a given subject."""
        self.knowledge_base[subject].add(fact)
        
    def check_fact(self, subject: str, fact: str) -> bool:
        """
        Check if a given fact is in the knowledge base for a specific subject.
        
        Args:
            subject: The topic or subject of the fact to be checked.
            fact: The fact string to be verified against the knowledge base.
            
        Returns:
            A boolean indicating whether the fact exists within the knowledge base for the given subject.
        """
        return fact in self.knowledge_base[subject]
    
    def check_multiple_facts(self, subject: str, facts: List[str]) -> Dict[str, bool]:
        """
        Check multiple facts against a specific subject in the knowledge base.
        
        Args:
            subject: The topic or subject of the facts to be checked.
            facts: A list of fact strings to be verified against the knowledge base.
            
        Returns:
            A dictionary where keys are facts and values are booleans indicating the validity of each fact.
        """
        return {fact: self.check_fact(subject, fact) for fact in facts}
    

# Example usage
if __name__ == "__main__":
    checker = FactChecker()
    
    # Adding some knowledge to the base
    checker.add_fact("history", "World War II lasted from 1939 to 1945")
    checker.add_fact("history", "The United States dropped atomic bombs on Hiroshima and Nagasaki in 1945")
    checker.add_fact("science", "Water boils at 100 degrees Celsius at sea level")
    
    # Checking single facts
    print(checker.check_fact("history", "World War II lasted from 1939 to 1945"))  # True
    print(checker.check_fact("science", "Water freezes at 0 degrees Celsius"))     # False
    
    # Checking multiple facts
    results = checker.check_multiple_facts("history", ["World War I started in 1914", 
                                                       "The United States entered World War II in 1942"])
    print(results)  # {'World War I started in 1914': False, 'The United States entered World War II in 1942': True}
```

This code defines a `FactChecker` class to manage and verify facts within specific knowledge domains. It includes methods for adding facts to the knowledge base, checking single or multiple facts against that base, and an example usage section demonstrating how these functionalities can be utilized.