Experienced gardeners advise against planting snap peas after late April because peas do not develop properly in warm weather. This year, however, the weather was unusually cool into late June, and ttherefore the fact that these snap peas were planted in mid-May is unlikely to result in crop failure despite the experts' warnings.
The pattern of reasoning displayed above is most closely paralleled in the statement 'Since African violets do not thrive in direct sunlight, it is said that in this region these plants should be placed in windows facing north rather than south; however, since these south-facing windows are well shaded by evergreen trees, the African violets placed in them are likely to grow satisfactorily.'