These were poor excuses. One who buys a field or livestock normally examines them beforehand, so there is no great urgency to examine them afterward.
وَذَكَرَ آخَرُ أَنَّهُ ٱشْتَرَى فَدَادِينَ بَقَرٍ وَيُرِيدُ أَنْ يَفْحَصَهَا .‏