84. 'They dealt with Our signs unjustly' refers to their rejection of God's signs and to the fact that they dismissed them as sheer sorcery. If a person scoffs at a beautiful couplet, and dubs it as amateurish rhyming, this amounts to committing an offence against poetry itself. Likewise, to brand those extraordinary acts of God as sorcery and magic - even though magicians declared that those acts were beyond their ability - constitutes a serious offence not only against God's signs but also against common sense and truth.