No, it isn't actually:
Isa 8:20 To the law and to the testimony: if they speak not according to this word, it is because there is no light in them.
And that you mischaracterize "Sola Scriptura" is another of your faults. Sola Scriptura, includes Creation, Jesus, Holy Ghost/Spirit, Angels, Voices from Heaven, Prophets, Visions, Dreams, Signs, Wonders, animals (like a donkey), etc, for all of it is sanctioned in scripture, but all of it must be judged by scripture, Isa 8:20; 1 Cor 14:32; Acts 17:11 (at least there are some noble, while others are not so), etc.