Can algorand resist the sybil attacks

Dear all
Algorand can resist the sybil attacks greatly, only if the rights of honest users are greater than 2/3.Because the likelihood that this account will be selected to propose and vote on blocks is proportional to its amount of stake.
However, in the paper “Algorand: Scaling Byzantine Agreements
for Cryptocurrencies”- 9 IMPLEMENTATION, the author say “we leave the problem of implementing a Sybil-resistant gossip network to future work". This is contradictory and then can algorand resist the sybil attacks?