Locke believed that the world must make sense or, put differently, the world must be
Intelligible.
He argued that necessary laws govern the world and that consequently the world can be explained and understood though there are irregularities in the world due to the reality that the senses do not provide absolute knowledge of what the world is like.
Again, Locke concluded that despite these irregularities the world is understandable.
He further argued that we have a sort of intermediate knowledge of what the world is like.
Locke proposed that we experience images or representations of objects that exist in the external world, but we never have access to these things.
The question therefore emerged for Locke as to exactly how successful science can be possible since we can never possess absolute knowledge of the external world?
He argued that it is not completely possible to have completely accurate science and that we are therefore restricted to speculation about the external world.
This speculation is not to be equated with "guessing" since there are actual laws operating within the world and, as stated above, despite the irregularities in our knowledge of the external world, this knowledge is still reliable.
