Martin (1992: 114):
The description is now in a position to review the following proportionalities between presenting and presuming superset Deictics (taken from Hudson 1974). Note that /θ/ and /tζ/ are strongly associated with phoric Deictics in English: which, each, either, neither, both, the, this, that, these, those (for such, other, there, then see below) — the phonæsthesia perhaps deriving from the iconicity of pointing with the tongue.
PRESENTING : PRESUMING SUPERSET ::
what/who : which ::
every : each ::
any : either ::
no : either::
all : both
 This continues the mistaking of the deictic function of determiners for their referential function; see previous posts.
 Trivially, this mistakes the voiceless dental fricative /θ/ for voiced /ð/.
 To be clear, this is the voiceless affricate /ʈʃ/.