"II. Of the Word or Son of God, which was made very Man.
The Son, which is the Word of the Father, begotten from everlasting of the Father, the very and eternal God, and of one substance with the Father,"
VI. Of the Sufficiency of the Holy Scriptures for Salvation.
Holy Scripture containeth all things necessary to salvation: so that whatsoever is not read therein, nor may be proved thereby, is not to be required of any man, that it should be believed as an article of the Faith, or be thought requisite or necessary to salvation.
XX. Of the Authority of the Church.
The Church hath power to decree Rites or Ceremonies, and authority in Controversies of Faith: and yet it is not lawful for the Church to ordain any thing that is contrary to God's Word written, neither may it so expound one place of Scripture, that it be repugnant to another. Wherefore, although the Church be a witness and a keeper of Holy Writ, yet, as it ought not to decree any thing against the same, so besides the same ought it not to enforce any thing to be believed for necessity of Salvation."
Articles of Religion — Center for Reformation Anglicanism
So the word of God is identified here as "the Son", and since He is of one substance with the Father, infallible (not the Bible, the Son). Then the Holy Scriptures are sufficient for salvation, and while they are "God's word, written", they are not deemed infallible, nor are they cited as the only required authority, but they do restrict the powers of the church such that the church must not contradict or add to them.
If that makes Anglicanism "liberal", then liberal it is.
Any dispute among Anglicans regarding our churches should be over only that last sentence in my quote "
ought not to decree any thing against the same, so besides the same ought it not to enforce any thing to be believed..." and certainly not depend on the infallibilty of the Bible with the Bible afforded the exclusive position as God's word.