"""Create fact_checker
Generated by Phi-Octopus Eden
2025-11-06 07:07:12.071378
"""

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

class FactChecker:
    """
    A simple fact-checking system that evaluates statements based on predefined rules.
    """

    def __init__(self, rules: List[Dict[str, Any]]):
        """
        Initialize the FactChecker with a list of rules.

        :param rules: A list of dictionaries where each dictionary contains keys 'statement' and 'check_function'
                      to define what statement to check and how to evaluate it.
        """
        self.rules = rules

    def check_fact(self, statement: str) -> bool:
        """
        Check if the given statement is true based on predefined rules.

        :param statement: The statement to be checked.
        :return: True if the statement is considered true, False otherwise.
        """
        for rule in self.rules:
            if rule['statement'] == statement and callable(rule['check_function']):
                return rule['check_function'](statement)
        raise ValueError(f"No rule defined for statement: {statement}")

    def add_rule(self, statement: str, check_function) -> None:
        """
        Add a new rule to the FactChecker.

        :param statement: The statement that needs to be checked.
        :param check_function: A function that returns True or False based on the given statement.
        """
        self.rules.append({'statement': statement, 'check_function': check_function})

def is_fact_true(statement: str) -> bool:
    """
    Example simple check function for verifying a fact.

    :param statement: The statement to be checked.
    :return: True if the statement appears true based on this example, False otherwise.
    """
    # This is a placeholder. Replace with actual logic.
    return "example" in statement

def main():
    checker = FactChecker([
        {'statement': 'The Earth revolves around the Sun.', 'check_function': lambda s: 'Sun' in s},
        {'statement': 'Water boils at 100 degrees Celsius.', 'check_function': is_fact_true}
    ])
    
    print(checker.check_fact("The Earth revolves around the Sun."))  # Expected output: True
    print(checker.check_fact("Water freezes at -40 degrees Fahrenheit."))  # Expected output: False
    
    checker.add_rule('2 + 2 equals 4.', lambda s: 'equals' in s and '+2+2=4' == s)
    print(checker.check_fact('2 + 2 equals 4.'))  # Expected output after adding rule: True

if __name__ == "__main__":
    main()
```

This code defines a `FactChecker` class capable of evaluating statements based on predefined rules. It also includes an example usage and a placeholder for actual fact-checking logic.