Final answer:
One negative drawback of Erwin Schrödinger's theory is the absurd implications it presents, such as the simultaneous dead and alive state of Schrödinger's cat.
Step-by-step explanation:
One negative drawback of the theory by Erwin Schrödinger is the absurd implications it presents, as demonstrated by the famous thought experiment known as Schrödinger's cat. This experiment involves a cat being simultaneously dead and alive inside a sealed box, which goes against our understanding of reality. Schrödinger himself used this thought experiment as an argument against the commonly taught view of quantum mechanics, known as the Copenhagen interpretation.