Jamesy wrote:
what does my uncel mean though by "play them for a fool" and "playing them against each other"
I have no idea what your uncle specifically means by those phrases as I don't know the context in which they were said. Context is very important.
I can however tell you what is generally meant by those expressions. "Playing someone for a fool" might indicate that a person is exploiting someone, by pretending to be something they are not, by deceiving them, or by exploiting someone's naivety.
You could ask your uncle for an explanation of how he thinks this applies to the relationship between you and your parents.
Playing one party (off) against another makes reference to a situation where someone attempts to get what they want by exploiting either a difference of approach, or a difference in the relationship between that person and two other people, in this case the parents.
Example, a child knows that parent A will not give permission for something, but parent B might, so the child goes to parent B to get permission for what the child wants to do, even if the child knows that this may cause an argument between parents A and B.
Another example, the child has a better, more cordial relationship with parent A. Parent B is jealous of this. If the child senses this it can play A and B off against each other, perhaps by promising to be nicer to parent B if parent B gives them a reward.
I hope this makes some sense. Again I am not saying your uncle is right. Personally I can understand why your family want you to look for some work. They are concerned about your future as they won't live forever.
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I have traveled extensively in Concord (Thoreau)