You dont have to you imply these things LOGICALLY when you say b/c we can think, whats the cut off of cognitive ability? It cant be just b/c we think b/c then you involve all animals which im sure you eat, which leads to the amount of cognitive ability that humans have, well some humans dont have the same amount of cognitive ability of others in many instances elderly operate at much less capacity of normal humans so where do you draw the line if you are using b/c we can think as a variable for humans being more important than plants. Thinking isnt a strictly human trait so if you cant kill a mentally handicapped human b/c he has the ability to think you logically cant kill a animal b/c it has the ability to think as well. If you want to differentiate between human and animal cognitive ability there must be a cut off line which some humans will undoubtedly fall below and some animals will surpass, so LOGICALLY you have to be ok with being able to kill the humans that fall below and not kill the animals that surpass your cut off line...You see the logical problem with using b/c we think as a definitive variable in this case, it could be used to justify infantcide b/c the child doesnt have the cognitive ability to pass the cut off line. ILLOGICAL to use b/c we think.
I have these relationships beach, no wife as of yet but hopefully down the road. But if somebody loses a spouse do they not get another one?, if they lose a friend do they not fill the void? If the human race was to be exterminated tomorrow would another species not flourish, as much as we like to think we are irreplaceable we arent.
I agree
So we are talking about animals instead of plants now? I'm a vegetarian. lol.

But I don't have a problem with using animals as food, for science, as pets, etc.
We don't murder mentally disabled because they have a right to life. That's what our Constitution says. I forget which amendment says this, but we cannot deprive them or anyone of life without due process. That's really all the support I need regarding the disabled and infants.
Sure you can find a new spouse, adopt new kids, make new friends. What I'm saying is the relationships are not interchangeable like pulling a plant out of the ground and replacing it with a new one. There is sadness, grieving, depression, etc. involved when you lose a loved one and/or friend (however you lose them). It comes at great cost.