"""Create fact_checker
Generated by Phi-Octopus Eden
2025-11-08 06:52:23.330406
"""

```python
from typing import List, Dict


class FactChecker:
    """
    A class designed to verify the accuracy of statements based on given facts.

    Attributes:
        facts (Dict[str, bool]): Dictionary mapping statement keys to their truth value.
        knowledge_base (List[str]): List of known statements used for context.

    Methods:
        add_fact: Adds a new fact or updates an existing one in the facts dictionary.
        check_fact: Determines if a given statement is true based on available facts and context.
        update_knowledge: Updates the knowledge base with new statements, potentially affecting checks.
    """

    def __init__(self):
        self.facts = {}
        self.knowledge_base = []

    def add_fact(self, fact_key: str, truth_value: bool) -> None:
        """
        Adds a new fact or updates an existing one in the facts dictionary.

        Args:
            fact_key (str): The key representing the statement to be verified.
            truth_value (bool): True if the statement is true, False otherwise.
        """
        self.facts[fact_key] = truth_value

    def check_fact(self, statement: str) -> bool:
        """
        Determines if a given statement is true based on available facts and context.

        Args:
            statement (str): The statement to be checked for its truth value.

        Returns:
            bool: True if the statement is verified as true, False otherwise.
        """
        # Simple check without complex reasoning
        return any(key in statement for key in self.facts.keys())

    def update_knowledge(self, new_statements: List[str]) -> None:
        """
        Updates the knowledge base with new statements, potentially affecting checks.

        Args:
            new_statements (List[str]): A list of new statements to be added or verified.
        """
        for statement in new_statements:
            if statement not in self.knowledge_base:
                self.add_fact(statement, True)  # Assuming new statements are true initially
                self.knowledge_base.append(statement)


# Example usage
if __name__ == "__main__":
    fact_checker = FactChecker()
    fact_checker.add_fact("Earth is round", True)
    fact_checker.add_fact("2 + 2 equals 4", True)

    print(fact_checker.check_fact("The Earth is not flat"))  # Expected: True
    print(fact_checker.check_fact("2 + 2 equals 5"))       # Expected: False

    new_statements = ["The moon orbits the Earth", "Gravitational force exists"]
    fact_checker.update_knowledge(new_statements)

    print(fact_checker.check_fact("Mars is a planet in our solar system"))  # No direct fact, should return False
```