Make that 40, then cut it in half. There are probably about two dozen denominations ( if you ignore any sub-divisions). And among non-Catholic Christians all believe in the Five Solas (unless they have become thoroughly liberal)
But this is false. Rightly dividing the Word of Truth, comparing Scripture with Scripture, using all legitimate Bible study tools, and understanding the mind of God and Christ as revealed in Scripture will DEFINITELY lead to the truth. Indeed God says that the Holy Spirit will lead us into ALL TRUTH, and that we have an *unction* or anointing from the Holy Spirit.
The real issue is "DO YOU WANT THE TRUTH, THE WHOLE TRUTH, AND NOTHING BUT THE TRUTH?"