This might sound a bit rude, so steel yourself. Keep in mind it's not an attack ad personam - I'm just trying to get you to reconsider your methodology of acquiring knowledge. What have you seen of the measurement methods used for either dark energy or dark matter to give weight to your assertion? You state is as a fact. Have you looked at error bars in spectroscopic measurements of rotation curves, and decided they report values beyond what the instrument is capable of? Have you read Adam Reiss' (et al.) research on dark energy, for which he received the Nobel prize, and found some errors?