Home / Weak arguments / Borrowed reason
V1
"Going vegan will make you healthier."
Borrowed reason
They talk about health, hunger or the planet instead of the animals. When the borrowed reason falls, the motivation falls with it.
Why it is weak
It's imprecise: any badly planned diet carries risks.
And even if it were true, it speaks to the eater's choice, not to the animals. Someone who stops eating animals for their health will drop the position the day they find evidence, real or apparent, that they can be healthy eating animals. Technology may even make those products safer than they are today.
How to say it better
A well-planned vegan diet is viable. That shows the duty not to harm animals can be met, but the duty comes from them, not from your health.