weakest

1. Any relationship between sales tax and 進化論??

2. "筆者正在進行著新「宇宙大爆炸聖論」研究、討論、教導、問題及問卷調查". "
Teaching others for something that's still in reseach process (sounds not confirmed...) is appropriate?

3. "大家是否應該再花費大量時間金錢去研究「進化論」呢？"
The writer is himself spending $$ and time to analyse 「進化論」...