It seems to me that whoever wrote those articles has no physical evidence to back up his statements that time isn't a dimension, or that time travel, tachyons, etc. aren't real. There's a saying that goes, "Where there's a will, there's a way". Assuming that's true, denials of the existence of such concepts are full of utter bullshit. The average human mind, even the average scientific one, has a lot of learning to do. Have you ever heard of the Philadelphia Experiment, the Nazi Bell, or the theory that some "ETs" we see may be time travelers from the future?