Quote by Source Unknown
If someone offers to furnish a sure test, ask what the test was which made the sure test sure.
Summary
This quote suggests that when someone claims to have a foolproof or guaranteed test for something, we should always question the credibility of that test. The idea is to inquire about the test that was used to verify the effectiveness and reliability of the sure test being proposed. By doing so, we can critically evaluate the validity and accuracy of the test, avoiding blind trust in anything presented as infallible. It encourages us to be skeptical and inquire deeper before accepting any claim or test as foolproof.