• If there is a possibility of several things going wrong, the one that will cause the most damage will be the one to go wrong.
• If there is a worse time for something to go wrong, it will happen then.
• If you perceive that there are four possible ways in which a procedure can go wrong, and circumvent these, then a fifth way, unprepared for, will promptly develop.
• If everything seems to be going well, you have obviously overlooked something.
• Nature always sides with the hidden flaw.
• Whenever you set out to do something, something else must be done first.
• Every solution breeds new problems.
• Enough research will tend to support your theory.
• When there is a very long road upon which there is a one-way bridge placed  at random, and there are only two cars on that road, it follows that: (1) the two cars are going in opposite directions, and (2) they will always meet at the bridge.

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