sometimes i think people are odd. i say hi to them when they come but they don't bother to say bye when they leave. why do people choose not to acknowledge others sometimes? I admit that i'm guilty of that but it's only when they don't see me and i just leave it. but since i've already acknowledge them, why can't they do the same? i don't understand people.

anyway, i've almost completed by biology essay, until i realised i've got quite a bias argument, but after spending about 4 hours on it, i feel really tired to reconfigure everything. I guess that's why the prof gave us 2 weeks to finish the essay, not 7 hours.

Tell me a joke please.