To cherry pick

[poli]

This means select a single bit of information out of a vast amount of information to draw a conclusion which is biased. Is there a Spanish equivalent. I think you can say extrapolar en una manera injusta but I'm not sure. Is there an idiomatic expression for this?

[aleCcowaN]

It's the fallacy of "selección de la información", "evidencia incompleta" o "supresión de pruebas". It's often used the loan word cherry-picking in academical settings to mean "you willingly select what helps your case and ignore the vast field of what's against it".

There are several different uses according the circumstances, from "recordar los aciertos y olvidar los yerros" or "punteo de la información" to the popular "¡vos the agarrás de lo que te conviene!".

[wrholt]

Another meaning of "(to) cherry pick" is the act of buying something at a price that is significantly lower than its true value, usually because the seller is not aware of the proper value of the item. A classic example is finding something unusual or valuable at a flea market or yard sale, or searching through the stock of a rare coin dealer or rare stamp dealer.