"""Create reasoning_engine
Generated by Phi-Octopus Eden
2025-11-06 13:10:44.468752
"""

```python
from typing import List, Dict

class ReasoningEngine:
    """
    A simple reasoning engine that can evaluate logical expressions based on provided facts.
    
    Attributes:
        knowledge_base (Dict[str, bool]): A dictionary mapping statements to their truth values.
    
    Methods:
        add_fact: Adds a new fact to the knowledge base.
        deduce_conclusion: Determines if a conclusion is true given the current state of knowledge.
    """
    def __init__(self):
        self.knowledge_base = {}
    
    def add_fact(self, statement: str, value: bool) -> None:
        """Add a new fact into the knowledge base."""
        self.knowledge_base[statement] = value
    
    def deduce_conclusion(self, conclusion: str) -> bool:
        """
        Deduces whether a given conclusion is true based on the current state of the knowledge base.
        
        Args:
            conclusion (str): The logical expression to be evaluated. Must only use 'and', 'or' and 'not'.
        
        Returns:
            bool: True if the conclusion is deduced as being true, False otherwise.
        """
        try:
            from sympy import parse_expr
            expr = parse_expr(conclusion, evaluate=False)
            return expr.subs(self.knowledge_base).is_true
        except KeyError as e:
            raise ValueError(f"Unknown statement: {e}")
        except Exception as e:
            raise ValueError(f"Invalid expression: {e}")

# Example usage:

reasoning_engine = ReasoningEngine()
reasoning_engine.add_fact('A', True)
reasoning_engine.add_fact('B', False)

print(reasoning_engine.deduce_conclusion('A and B'))  # Output: False
print(reasoning_engine.deduce_conclusion('not A or B'))  # Output: False
```