I disagree. We should be able to at least agree on the clearly observable facts and upon the scientific facts.
One of the agreements among embryologists, the scientists studying the beginning of life, is that an embryo
and a fetus are human beings, just at different stages of life than a newborn, a toddler, a teenager, a young adult, and older adult etc. There has been a scientific consensus for many decades, close to a century and the certainty becomes all the stronger over time.
A few excerpts from the top experts from around the world who testified before the Senate Judiciary Subcommittee hearings on the topic of when does human life begin:
https://prolifepages.wordpress.com/when-does-life-begin-senate-judiciary-subcommittee-hearings-april-1981/
* “Father of Modern Genetics” Dr. Jerome Lejeune told the lawmakers: “To accept the fact that after fertilization has taken place a new human has come into being is no longer a matter of taste or opinion … it is plain experimental evidence.”
* Dr. Hymie Gordon, Chairman, Department of Genetics at the Mayo Clinic, added: “By all the criteria of modern molecular biology, life is present from the moment of conception.”
* Dr. Richard V. Jaynes: “To say that the beginning of human life cannot be determined scientifically is utterly ridiculous.”
The testimony of the world's top experts and of the medical textbooks were unanimous in stating that new human beings come into existence at conception.