Lack of knowledge does not make it a fair assumption, The Baha'i writings are only infallible in certain aspects. Spiritual Laws have a temporal period of application, Concerning spiritual Laws and principles, yes, and the spiritual laws and principles are interpreted and applied over time by the Houses of Justice, but as with the history of all religions infallibility is an evolving concept. In terms of science, and history particularly since commentary. I believe one thing very very clear in the past. The Baha'i writings believe in the harmony of science and religion, and scripture,including Baha'i scripture,must be interpreted and understood in the light of the evolving knowledge of science.
Also,it must be understood that progressive Revelation is an evolving process of Spiritual knowledge,and as in the past. Revelation is progressive and human knowledge evolves over time involving a human history hundreds of thousands and possibly millions of years.Humans both physically and spiritually evolve,