Each case must be decided on its own particular merits having in mind the particular evidence produced by the parties on that case (which is likely to differ from case to case).
Mae’n rhaid penderfynu ar bob achos ar sail ei nodweddion penodol ei hun, gan ystyried y dystiolaeth a gynhyrchwyd gan y partïon i’r achos hwnnw (sy’n debygol o fod yn wahanol o achos i achos).