<span>A series of adjectives that follows a noun and, is usually set off by comma's and dashes. </span>
It should be <span>claim, reason, evidence, counterclaim and rebuttal, conclusion. I took an AP English class last year that taught me how to write a persuasive essay. </span>
A simile can be found when using "like" or "as" between two things. Example: I'm as happy as a clown.
Your question would be a metaphor. Both things are being compared to a science expieriment, probably meaning that they need to have an outcome, but it isn't known for sure if it will be a good or bad outcome.
Things like this can be taken many ways, so if you think something else, I'm sure it would work as well.
You can't you need to show your text to compare them
