Centred or justified body text

Centred text moves the start of every line, so the eye hunts for it. Acceptable for a heading or a couple of lines; never for a paragraph. Justified text is worse and has no acceptable case here. Stretching word spacing to force a straight right edge creates uneven gaps and vertical "rivers" of white space running down the block — actively harmful for dyslexic readers, and the reason books that justify are harder to read than they look.