For example if the answer for question A is true, then the answer for question B must also be true. If a candidate gotten A wrong, then he is likely to get B wrong as well. Of course, the above only occurs in examinations.
There is another type of mistake modern magicians made which is to mix religious doctrine in magical practices. This mistake is particularly noticeable in modern Thai magic and Taoist magic.
Since Taoist magic is almost extinct by now, I would just elaborate problems with modern Thai magic in this discussion.
Before we venture into any form of rituals, we must first study and understand their 'structure' or how they are composed. By going through the structure, we will know what the ritual wanted to emphasize.
Let us just quickly refer to Tibetan Buddhist ritual since it is normally well structured with a central theme.
A Tibetan ritual normally starts with homage to the three gems and lineage gurus, and then the generation of Buddha heart. After that everything would be resolved into emptiness and the regeneration of the main deity. The deity would then dissolved into emptiness and then emerged from emptiness.
The Tibetan masters have kept this structure very rigidly throughout the years but not so in Thai magic...
Traditional Thai magic rituals normally requires a practitioner to pay homage to lineage gurus, and one's ancestors and the guardian spirits. The structure was pretty crisp and clear.
I am not aware of since when the modern versions of Thai ritual started to see the seeking refuge to the three gems, and the calling upon of Hindu deities but fall short of calling the God.
Perhaps people who composed such rituals think that they would get the best of a few religions to empower their rituals? If so, then these folks are seriously wrong because religions and magic have conflicting aims. It is also true that between religions too the doctrines are different.
By simply calling all the Buddhist deities, Hindu deities, Thai deities and some other deities will make the energy of such ritual very confusing. Not only no spirits can and will carry out the instructions of the magician, the magician himself would become blurred in long run and started to doubt what he have learnt really works.
Let us examine what happened to these modern Thai magic rituals:
If a ritual is started with seeking refuge to the Buddha, Dharma and Sangha; then you have effectivelly instructed your spirits to become a Buddhist and abide by all Buddhist teachings.
After that you start to invite Shiva, Brahma and Vishnu to join the party. Such act is strictly forbidden by Buddhist teaching because following any external paths is not acceptable after seeking refuge.
Now the question arises as to the identity of the magician as a Buddhist or a Hindu. Such a situation is in real conflict here and which one do you want your spirit to abide by?
Later, you instructed the spirits to bring you the boy/girl you love to satisfy your lust. Hmm... by the power of the Buddha, Brahma, Shiva or Vishnu or something else? But isn't that it is forbidden in religions to used magic for satisfying one's own lusts?
It is indeed in such a way that your instructions to your spirits are being cancelled off step by step until the end of the ritual every day, and every time.
The best way and the most primitive way to instruct the spirit is simply: "Go and get me this man/woman..."
Simple is beauty but our modern entangled mind likes to make things complicated and cancels each other. Or which ever ways that I tried to explain the situation, magic really don't work one way or another...