| 21. | This cautiousness was not always a hard-and-fast rule.
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| 22. | I think this basically means there is no hard-fast rule.
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| 23. | :I doubt there is any hard-and-fast rule.
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| 24. | No hard and fast rule will do; use your good judgment.
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| 25. | There is no hard and fast rule for what constitutes a stub.
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| 26. | However, that was not a hard-and-fast rule.
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| 27. | :There is no hard and fast rule for something like this.
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| 28. | There are no hard-and-fast rules.
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| 29. | A : There is no hard and fast rule.
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| 30. | There is no hard-and-fast rule.
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