口講無凴 (hau2 gong2 mou4 pang4) — oral expressions can not be taken as evidence; word of mouth alone don't carry conviction in Cantonese
hauˊ²口gongˊ²講mouˎ₄無pangˎ₄凴简 口讲无凭
Mandarin Pinyin: kou3 jiang3 wu2 ping2
Meaning of 口講無凴
nounoral expressions can not be taken as evidence; word of mouth alone don't carry conviction