Those who believe in the inspiration of scripture teach that it is infallible (or inerrant), that is, free from error in the truths it expresses by its character as the word of God. However, the scope of what this encompasses is disputed, as the term includes 'faith and practice' positions, with some denominations holding that the historical or scientific details, which may be irrelevant to matters of faith and Christian practice, may contain errors. Other scholars take stronger views, but for a few verses these positions require more exegetical work, leading to dispute (compare the serious debate over the related issue of "perspicuity", attracting biblical and philosophical discussion).