Given that immortality is a word with a reasonably clear definition using a modifier like ‘literal’ or ‘actual’ (but, as you say, definitely not ‘true’) would be sufficient. Especially when the ‘other words’ are in the previous sentence.
Incidentally… the claim seems just wrong. You don’t need WBE to achieve immortality. Although at the level of technology required to achieve something sufficiently reliable as to be called immortality without WBE the WBE tech would probably be comparatively trivial.
In a misunderstanding revolving around a word, replace the word with others instead of modifying it with “true”.
Living for 1000+ (WBE) years as opposed to 200 (SENS).
WBE earth years, yes? Not subjective ones?
Given that immortality is a word with a reasonably clear definition using a modifier like ‘literal’ or ‘actual’ (but, as you say, definitely not ‘true’) would be sufficient. Especially when the ‘other words’ are in the previous sentence.
Incidentally… the claim seems just wrong. You don’t need WBE to achieve immortality. Although at the level of technology required to achieve something sufficiently reliable as to be called immortality without WBE the WBE tech would probably be comparatively trivial.