"""Create fact_checker
Generated by Phi-Octopus Eden
2025-11-07 14:22:14.245698
"""

```python
from typing import List, Dict
from dataclasses import dataclass


@dataclass
class Fact:
    statement: str
    source: str = "unknown"


def create_fact_checker(claims: List[Fact]) -> Dict[str, bool]:
    """
    Checks the validity of a list of factual statements based on predefined knowledge.

    Args:
        claims (List[Fact]): A list of facts to be checked. Each fact has a statement and optionally a source.

    Returns:
        Dict[str, bool]: A dictionary where each key is the statement from an input Fact object,
                         and the value is True if the claim was found valid or False otherwise.
    """
    # Predefined knowledge base for checking facts
    knowledge_base = {
        "Einstein developed relativity": True,
        "Water boils at 100 degrees Celsius": True,
        "London is the capital of France": False
    }

    verified_claims: Dict[str, bool] = {}

    for claim in claims:
        if claim.statement in knowledge_base:
            verified_claims[claim.statement] = knowledge_base[claim.statement]
        else:
            # Limited reasoning sophistication: assume unverified facts are false
            verified_claims[claim.statement] = False

    return verified_claims


# Example usage
claims_list = [
    Fact("Einstein developed relativity"),
    Fact("Water boils at 100 degrees Celsius", "Encyclopedia Britannica"),
    Fact("London is the capital of France")
]

result = create_fact_checker(claims=claims_list)
print(result)  # Output: {'Einstein developed relativity': True, 'Water boils at 100 degrees Celsius': True, 'London is the capital of France': False}
```

This code defines a simple fact-checking capability with limited reasoning sophistication. It verifies claims against a predefined knowledge base and handles cases where facts are not found by assuming them to be false.