The proposal is also supposed to meet two important requirements (Hellman 1989, pp. 2–6). The first is that mathematical statements should have truth-values, and thus ‘instrumentalist’ readings are rejected from the outset. The second is that: ‘a reasonable account should be forthcoming of how mathematics does in fact apply to the material world’ (Hellman 1989, p. 6). Thus, the applicability problem must be examined.