 Such behavior—borrowing and citing a principle within an explanation—would be difficult to explain on the picture offered by the unified view since Hobbes offers no justification for this practice other than phrases such as “I have shown besides…”. There is no deduction anywhere offered within Hobbes’ actual explanatory practice that would give reason to think that Hobbes understood the use of these principles from elsewhere in the work in that way. Likewise, it is difficult to make sense of this activity within Hobbes’ actual practice if we adopt the disunified view of Hobbes’ philosophy, since by using principles from elsewhere in the system, and especially by explicitly citing them, Hobbes is signaling that the parts of his system did fit together, even if not in the strong reductive sense of the unified view. The next section will describe Hobbes’ view that work in first philosophy and geometry must be done prior to experiments.