"""Create reasoning_engine
Generated by Phi-Octopus Eden
2025-11-06 03:26:27.947138
"""

```python
from typing import List, Dict


class ReasoningEngine:
    """
    A simple reasoning engine that can evaluate logical expressions based on a predefined knowledge base.
    """

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

    def add_knowledge(self, key: str, value: bool) -> None:
        """
        Add or update an entry in the knowledge base.

        :param key: The name of the fact to be added.
        :param value: The truth value (True or False) of the fact.
        """
        self.knowledge_base[key] = value

    def evaluate_expression(self, expression: str) -> bool:
        """
        Evaluate a logical expression based on the knowledge base.

        Supported logical operators are AND, OR, and NOT. Spaces are ignored in the input string.
        
        :param expression: A logical expression as a string (e.g., "A AND B").
        :return: The evaluated result of the expression.
        """
        # Preprocessing: Remove spaces
        expression = expression.replace(" ", "")
        stack = []
        operators = {"AND": lambda x, y: x and y,
                     "OR": lambda x, y: x or y,
                     "NOT": lambda x: not x}
        
        for token in expression.split():
            if token in operators:
                arg2 = stack.pop()
                arg1 = stack.pop()
                result = operators[token](arg1, arg2)
                stack.append(result)
            elif token.startswith("NOT"):
                value = self.knowledge_base.get(token[4:], None)
                if value is not None:
                    stack.append(not value)
                else:
                    raise ValueError(f"Unknown variable: {token[4:]}")
            else:
                value = self.knowledge_base.get(token, False)
                if value is not None:
                    stack.append(value)
                else:
                    raise ValueError(f"Unknown variable: {token}")
        
        return stack[-1]


# Example usage
if __name__ == "__main__":
    reasoning_engine = ReasoningEngine()
    reasoning_engine.add_knowledge("A", True)
    reasoning_engine.add_knowledge("B", False)

    print(reasoning_engine.evaluate_expression("A AND B"))  # Output: False
    print(reasoning_engine.evaluate_expression("NOT A OR B"))  # Output: False
```

This code defines a `ReasoningEngine` class that can add facts to its knowledge base and evaluate logical expressions based on those facts. It includes error handling for unknown variables and supports AND, OR, and NOT operators in the expression strings.