I didn't tell you to lie, per se. Obfuscate, that's a fair cop, but it isn't unethical or dishonest. It is routinely done in research situations where you are trying to remove an emotional aspect from the study. If you are trying to gauge a person's actual political leaning (as opposed to their
stated leaning, which might be different), you might read them a politician's quote and ask if they agree or disagree, without telling them if it came from Trump or Obama. You might even tell them it came from the opposite guy, to judge if they agree with the words or blindly follow the man no matter his words.
Same is true in other fields of inquiry. In the
marshmallow test, you don't tell the kids that you are testing their willpower to gauge their future success or failure. If you are testing medicines (or the
placebo effect itself), you don't tell the subjects if they got medicine or sugar pills.