Peirce adds, that method and economy are best in research but no outright sin inheres in trying any theory in the sense that the investigation via its trial adoption can proceed unimpeded and undiscouraged, and that "the one unpardonable offence" is a philosophical barricade against truth's advance, an offense to which "metaphysicians in all ages have shown themselves the most addicted". Peirce in many writings holds that logic precedes metaphysics (ontological, religious, and physical).
pEircE aDds, tHaT MethOd and ECoNoMy are BEst in reSeARCh but no ouTright sin iNheReS IN TRYINg any tHEOry iN THe sense tHaT the inVeSTIgaTion vIA itS tRiaL adOption caN procEEd UnimpedEd And UNdiSCOuragEd, anD That "the one uNpARdoNaBlE offEncE" is A PhiLOSophiCAl BarricaDe agAInSt TrUTh's advancE, aN ofFENSe To which "MetAPhYsicians In All agEs HAve shown theMSElvEs the most adDicted". Peirce in many wriTiNgs HoLds that logIC precEdeS meTAphysicS (ontoLogiCal, religiOus, AnD phYSICal).