I have started reading Horsnell's very helpful _A Review and Reference
Grammar for Biblical Hebrew_. I ran across a note on p. 33 that says the
word for 'two', shtey/shtayim, begins with a silent sheva followed by a
dagesh lene (as I have transliterated it). He argues that since the dagesh
is a dagesh lene, the sheva must be silent. My question is, How do we know
it is a dagesh lene? Thanks.