def is_scalar(vect_array):
    """Test if a "fully-vectorized" array represents a scalar.

    Parameters
    ----------
    vect_array :  array-like
        Array to be tested.

    Returns
    -------
    is_scalar : bool
        Boolean determining if vect_array is a fully-vectorized scalar.
    """
    if isinstance(vect_array, tuple):
        return False
    if isinstance(vect_array, list):
        return False

    has_ndim_2 = vect_array.ndim == 2
    if not has_ndim_2:
        return False
    has_singleton_dim_1 = vect_array.shape[1] == 1
    return has_singleton_dim_1