"""Create logic_validator
Generated by Phi-Octopus Eden
2025-11-06 02:20:54.097993
"""

```python
from typing import Any


class LogicValidator:
    """
    A class for validating logical expressions and ensuring their correctness.
    
    This validator supports basic logical operators such as AND, OR, NOT,
    while providing a mechanism to check if an expression is logically valid.
    """

    def __init__(self, expression: str):
        self.expression = expression

    def validate_expression(self) -> bool:
        """
        Validates the logical expression and returns True if it's valid, otherwise False.

        :param expression: A string representing a logical expression (e.g., "A and B or not C").
                           The variables must be single letters.
        :return: A boolean indicating whether the expression is logically consistent.
        """
        try:
            from sympy import symbols, And, Or, Not, simplify

            # Define the symbols
            symbols_list = set(self.expression.replace(" ", "")) - {"and", "or", "not", "(", ")"}
            for symbol in symbols_list:
                if not symbol.isalpha():
                    raise ValueError(f"Invalid variable: {symbol}")
            symbols_dict = {sym: symbols(sym) for sym in symbols_list}

            # Construct the expression using sympy
            logical_expression = self.expression.replace("and", "&").replace("or", "|").replace("not", "~")
            for key, value in symbols_dict.items():
                logical_expression = logical_expression.replace(key, f"({value})")

            # Simplify and check validity
            simplified_expression = simplify(logical_expression)
            if not isinstance(simplified_expression, (And, Or, Not)):
                return False

            # Check for contradictions by evaluating the expression with all possible truth values
            variables = list(symbols_dict.values())
            for combination in [dict(zip(variables, vals)) for vals in [(True, True), (True, False), (False, True), (False, False)]]:
                if not simplified_expression.subs(combination):
                    return False

            return True

        except Exception as e:
            print(f"Validation failed: {e}")
            return False


# Example usage
validator = LogicValidator("A and B or not C")
print(validator.validate_expression())  # Expected output: True (assuming A, B are True and C is False)

validator = LogicValidator("A and not A")  # This should be invalid due to contradiction
print(validator.validate_expression())  # Expected output: False

```