This is not presumptively the case with an older offender. Instead, particularly in the context of drug offences, as is the case here, the law is clear that deterrence is the dominant consideration, and save for the “purely exceptional case”, a custodial term is usually warranted: Dinesh Singh Bhatia s/o Amarjeet Singh v Public Prosecutor [2005] 3 SLR(R) 1 (“Dinesh Singh”) at [59] (and see more below at [17]–[19]). Precedents where probation, instead of a sentence of imprisonment, has been ordered for older drug offenders involved those who were suffering from psychiatric or other conditions that were in some way causally related to their offences. For example, in Public Prosecutor v Lee Han Fong Lyon [2014] SGHC 89, the High Court upheld a sentence of probation for a 25-year-old drug offender, noting that the offender’s Attention Deficit Hyperactivity Disorder “was a factor in his criminality” (at [6]). This is not to say that probation will, as a matter of course, be ordered in such cases; rather, where an offender proves that he was suffering from a psychiatric or other condition that was in some way causally related to his drug offence, the court might consider it permissible, in the appropriate circumstances, to depart from the default position that a custodial term is warranted. In the present case, the Respondent did not claim to suffer from any psychiatric or physical condition.