If I tell you a 12-legged furry purple animal with very tiny teeth sits on your shoulder currently and needs you to feed it immediately, this is an example of this symbolic
ability:

answer; latency;

answer; /// many people disagreed about the deviant status of marijuana; ;

it might look like that the ideal way to research the health effects of trans fats is through a controlled experimental feeding trial. but these kinds of trial have several important limitations that the researcher must look into:

short in duration (this factor usually checks up on the intermediary risk factors rather than the actual outcomes of the disease)

limited dietary changes

only makes use of healthy participants