I ask this in good faith, and I do not mean to bring about struggle sessions with this question (keep it civil, please :). I'm writing a sort of mini-essay on a certain topic (Edit: not anymore, I lost my writing appetite), and veganism fits into that topic (I'm keeping it vague because I'll probably post it here and I don't want to spoil the whole thing). If people are on the fence and others want to know more about what Veganism is and why they should consume in that way, I would be grateful if others more experienced and well-read on the subject could provide resources or counter-reasons. I feel like a lot of the things I believed before going vegan turned out to be misconceptions, and it doesn't hurt to be more educated on a subject, right?
Edit: I need to take a break from the internet again, if my brain wasn't fried already it is now (not anything any of you started, I brought this upon myself)
Insects also have brains. Some arachnids have the capacity for fairly complex cognition (e.g., the portia spider's hunting behaviors, jumping spiders communicate with eachother and in my opinion, engage in playful behavior).
The issue isn't with your terminology, but rather with what it reveals about the imprecision/inconsistency of your reasoning on these matters.
If you're going to draw a line at eating beings that can feel the harm done to them by eating, it might serve you to explore that boundary more thoroughly.