Why not all of it?
And another thing. If we think that we can justify the belief that our senses are a reliable guide to reality by appealing to our belief that God exists because a good God would not allow us systematically to be deceived – then what about the rest? If a good God would not allow us systematically to be deceived, why would a good God allow us to have such incomplete senses? Why would a good God not arrange for us to have exhaustive senses, that sense everything that can be sensed? Why are there senses that we don’t have? Why are the senses that we do have so limited? Why are there senses that animals have that we don’t have? Why can’t we hear that high note that dogs can hear? Why can’t we echolocate the way bats and dolphins can? I want to know.