"It's just a clump of cells, not a baby."
Most pro-lifers won't go more than a month or two without hearing this stubborn phrase. Pro-choicers often chant it as a one-liner to shoot down a pro-lifer's honest argument or just to express their unyielding abortion support. In cases where they actually believe it and are willing to discuss with you, it's important to have a few handy points up your sleeve to get them really listening.
Despite this phrase being both inaccurate and usually thrown about only to deceive or provoke anger, in a culture where '"repeating something enough makes it true," it has become a widely-held "fact" among the public. However, there is much to rebut against this argument, and that’s why it gets so tough. Where do we even start?
Well, to begin with, I often like to point out that every human alive right now, including both the pro-choicer and the pro-lifer, are also clumps of cells (or clusters of cells, blobs of tissue, etc.). This can prompt the opposition to get more specific as to the differences they are trying to highlight between the born and the unborn that they believe justify abortion. Two different paths can be taken from there, depending on their argument. The first is more scientific, and the second more philosophical. Ordinarily, they will both be touched upon at some point, in the respective order.