“Program testing can be used to show the presence of bugs, but never to show their absence!”
“Days of absence, sad and dreary, Clothed in sorrow's dark array, Days of absence, I am weary; She I love is far away.”
“Absence and death are the same - only that in death there is no suffering.”
“The surest test of discipline is its absence.”
“Courage is resistance to fear, mastery of fear - not absence of fear”
“Courage is not the absence of fear, but rather the judgement that something else is more important than fear.”
“Absence of evidence is not evidence of absence.”
Dr. Carl Sagan
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