I heard somewhere before that it depends on the first letter of the noun because it is describing the noun I guess that's wrong then. E.g That was an malicious attempt - 'an attempt'. To undergo a economic crisis - 'a crisis'. So we choose the article depend on the adjective? I'm confused about the last one, universal starts with a vowel so shouldn't it be 'an universal' fact? I'm really confused
I really can't understand how to determine by the sound because I'm not a native speaker so I can't really distinguish which should sound right. Can you help me determine the difference? because e.g. both an or a universal fact sounds alright to me. Can you give more examples also please?