String input validation with while

[sermanas]

How to use while statement for bad input validation? For example user must input Yes or No, and if its correct, while statement should not be executed. If input is bad, while statement should show user error message. My program didnt work, what im doing wrong?

  string value;
    cout << "input Yes or No: ";
    cin >> value;
    while (value != "Yes" || value!= "No")
    {
        cout << "Error! You must input Yes or No.\n";
        cout << "Input Yes or No: ";
        cin >> value;
    }

    return 0;

[vlad from moscow]

while (value != "Yes" && value!= "No")