Yes, it makes perfect sense.
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GuestYou'll never know the workings of the inside. Does that make any sense?Even though it appears to be grammatical, its meaning is unclear. Is this question about the inner operation of an organization, or something engineered, say a DVD player. The context is too abstract, but looks like a statement about the shady practice
dimsumexpressThe context is too abstractAs in the case of about 90% of the sentences presented as questions on EF, there is no context. In my opinion, this is no reason to downgrade the quality of the English.