"""Create fact_checker
Generated by Phi-Octopus Eden
2025-11-08 20:34:09.528190
"""

```python
from typing import List, Dict

class FactChecker:
    """
    A simple fact checking class that verifies if a given statement is true based on predefined knowledge base.
    """

    def __init__(self):
        self.knowledge_base: Dict[str, bool] = {}

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

        :param statement: The factual statement as a string
        :param truth_value: Boolean value indicating the truth of the statement
        """
        self.knowledge_base[statement] = truth_value

    def check_fact(self, statement: str) -> bool:
        """
        Checks if the given statement is true based on the knowledge base.

        :param statement: The factual statement to be checked as a string.
        :return: Boolean value indicating whether the statement is true or false.
        """
        return self.knowledge_base.get(statement, False)

    def verify_facts(self) -> Dict[str, bool]:
        """
        Verifies all facts currently in the knowledge base.

        :return: A dictionary with statements as keys and their truth values as values
        """
        return {k: v for k, v in self.knowledge_base.items() if v}

# Example usage:
if __name__ == "__main__":
    fact_checker = FactChecker()
    # Adding facts to the knowledge base
    fact_checker.add_fact("The Earth is round", True)
    fact_checker.add_fact("2 + 2 equals 5", False)
    fact_checker.add_fact("Python is a programming language", True)

    # Checking if the statements are true or false
    print(fact_checker.check_fact("The Earth is round"))  # Output: True
    print(fact_checker.check_fact("2 + 2 equals 4"))     # Output: False, not added directly

    # Verifying all facts in the knowledge base
    verified_facts = fact_checker.verify_facts()
    for statement, truth_value in verified_facts.items():
        print(f"{statement}: {truth_value}")
```

This example demonstrates a simple fact checking mechanism where statements are added to a knowledge base and can be checked against. Note that this is a basic implementation and does not include advanced reasoning capabilities or natural language processing.