Gur svefg cneg vf pbeerpg. Sebz Dhveeryy’f cbvag bs ivrj gur sebag raq bs Uneel’f oebbz uvgf gur sebag jvaqbj nsgre ur’f fuhg gur erne jvaqbj. Nf gur sebag fgbcf vg trgf ybatre, chfuvat onpx ba gur cnegf oruvaq vg, juvpu zhfg rvgure fdhnfu be fanc; gur bayl nafjre V pna tvir gb “gur oebbz vf zntvpnyyl vaqrfgehpgvoyr” vf “gung’f abg culfvpnyyl cbffvoyr”.
Sebz Uneel’f cbvag bs ivrj, gur sebag bs uvf oebbz uvgf gur sebag jvaqbj naq nppryrengrf encvqyl gbjneqf uvz, fuevaxvat nf vg qbrf fb (guvf vf orsber gur erne jvaqbj pybfrf). Vs ur’f fvggvat va gur zvqqyr gura ng fbzr cbvag ur fgbcf naq uvf senzr orpbzrf gur fnzr nf Dhveeryy’f. Vs ur’f fvggvat ng gur irel onpx bs gur oebbz gura ur tbrf guebhtu gur erne jvaqbj nsgre gur sebag bs gur oebbz “fubhyq” unir cnffrq guebhtu gur sebag jvaqbj, ohg ur pna’g lrg frr gung vg unfa’g (orpnhfr bs gur fcrrq bs yvtug). Fb vg’f culfvpnyyl vzcbffvoyr sbe gur oebbz gb or evtvq rabhtu gb fgbc uvz trggvat cnfg gur erne jvaqbj, orpnhfr gung jbhyq zrna genafzvggvat vasbezngvba snfgre guna gur fcrrq bs yvtug. Bar jnl be nabgure, gur oebbz unf gb pbzcerff.
Gur svefg cneg vf pbeerpg. Sebz Dhveeryy’f cbvag bs ivrj gur sebag raq bs Uneel’f oebbz uvgf gur sebag jvaqbj nsgre ur’f fuhg gur erne jvaqbj. Nf gur sebag fgbcf vg trgf ybatre, chfuvat onpx ba gur cnegf oruvaq vg, juvpu zhfg rvgure fdhnfu be fanc; gur bayl nafjre V pna tvir gb “gur oebbz vf zntvpnyyl vaqrfgehpgvoyr” vf “gung’f abg culfvpnyyl cbffvoyr”.
Sebz Uneel’f cbvag bs ivrj, gur sebag bs uvf oebbz uvgf gur sebag jvaqbj naq nppryrengrf encvqyl gbjneqf uvz, fuevaxvat nf vg qbrf fb (guvf vf orsber gur erne jvaqbj pybfrf). Vs ur’f fvggvat va gur zvqqyr gura ng fbzr cbvag ur fgbcf naq uvf senzr orpbzrf gur fnzr nf Dhveeryy’f. Vs ur’f fvggvat ng gur irel onpx bs gur oebbz gura ur tbrf guebhtu gur erne jvaqbj nsgre gur sebag bs gur oebbz “fubhyq” unir cnffrq guebhtu gur sebag jvaqbj, ohg ur pna’g lrg frr gung vg unfa’g (orpnhfr bs gur fcrrq bs yvtug). Fb vg’f culfvpnyyl vzcbffvoyr sbe gur oebbz gb or evtvq rabhtu gb fgbc uvz trggvat cnfg gur erne jvaqbj, orpnhfr gung jbhyq zrna genafzvggvat vasbezngvba snfgre guna gur fcrrq bs yvtug. Bar jnl be nabgure, gur oebbz unf gb pbzcerff.
http://en.wikipedia.org/wiki/Ladder_paradox
Thanks for both answers, now I feel I understand it. Also thanks for the wikipedia link.