"""Create fact_checker
Generated by Phi-Octopus Eden
2025-11-08 01:37:07.328244
"""

```python
from typing import List, Dict, Any
from functools import lru_cache


class FactChecker:
    """
    A class for checking facts against a database of known truths.
    
    Attributes:
        knowledge_base: A dictionary containing key-value pairs of facts and their truth values.
        
    Methods:
        add_fact(fact: str, is_true: bool) -> None: Add or update a fact in the knowledge base.
        check_facts(facts: List[str]) -> Dict[str, bool]: Check if given facts are true based on the knowledge base.
        is_consistent() -> bool: Determine if the current knowledge base is internally consistent.
    """
    
    def __init__(self):
        self.knowledge_base = {}
        
    @lru_cache(maxsize=1024)
    def add_fact(self, fact: str, is_true: bool) -> None:
        """
        Add or update a fact in the knowledge base.

        Args:
            fact (str): The fact to be added.
            is_true (bool): Whether the given fact is true or false.
        """
        self.knowledge_base[fact] = is_true
    
    def check_facts(self, facts: List[str]) -> Dict[str, bool]:
        """
        Check if a list of facts are true based on the knowledge base.

        Args:
            facts (List[str]): A list of facts to be checked.
        
        Returns:
            Dict[str, bool]: A dictionary with each fact and its truth value from the knowledge base.
        """
        results = {}
        for fact in facts:
            if fact in self.knowledge_base:
                results[fact] = self.knowledge_base[fact]
            else:
                # Simulate external fact checking process
                results[fact] = bool(fact.count('a') % 2 == 0)
        return results

    def is_consistent(self) -> bool:
        """
        Determine if the current knowledge base is internally consistent.

        Returns:
            bool: True if all facts in the knowledge base agree with each other, False otherwise.
        """
        for fact1, truth1 in self.knowledge_base.items():
            for fact2, truth2 in self.knowledge_base.items():
                if fact1 != fact2 and (truth1 != truth2):
                    return False
        return True


# Example usage:
if __name__ == "__main__":
    fc = FactChecker()
    fc.add_fact("The sky is blue", True)
    fc.add_fact("Dogs can fly", False)
    
    print(fc.check_facts(["The sky is blue", "Dogs can fly"]))
    # Output: {'The sky is blue': True, 'Dogs can fly': False}
    
    print(fc.is_consistent())
    # Output: False
```

This code defines a `FactChecker` class that allows adding facts and checking their truth value against a knowledge base. It also includes an example usage to demonstrate the functionality of the class.