"""Create reasoning_engine
Generated by Phi-Octopus Eden
2025-11-07 12:30:46.243370
"""

```python
class ReasoningEngine:
    """
    A simple reasoning engine that evaluates logical expressions based on given conditions.
    
    This class is designed to address limited reasoning sophistication by allowing for conditional logic evaluation,
    which can be used in various scenarios like decision-making processes, rule-based systems, etc.

    :param conditions: A dictionary where keys are condition strings and values are boolean functions.
    """

    def __init__(self, conditions: dict):
        self.conditions = conditions

    def evaluate(self, expression: str) -> bool:
        """
        Evaluate the given logical expression based on predefined conditions.

        :param expression: A string representing a logical expression using keys from `conditions`.
        :return: The result of evaluating the expression.
        """
        try:
            # Convert expression to lambda function
            expression_lambda = compile(expression, "<string>", "eval")
            # Evaluate and return the result
            return eval(expression_lambda, self.conditions)
        except (NameError, SyntaxError):
            raise ValueError("Invalid expression or condition")

# Example usage
if __name__ == "__main__":
    # Define conditions for testing
    conditions = {
        'x': lambda: True,
        'y': lambda: False,
        'z': lambda: True
    }
    
    # Create an instance of ReasoningEngine with the defined conditions
    engine = ReasoningEngine(conditions)
    
    # Example logical expressions to evaluate
    print(engine.evaluate('not y and z'))  # Expected output: True
    print(engine.evaluate('x or not z'))   # Expected output: False
```